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12.On the generalized difference polynomials, Pac.J.Math.143,No.2,(1990)341-348. (in colab.cu D Stefanescu). Zbl.Math.689.12013. 13.A class of polynomials in positive characteristic. Bull.Math.Soc. Sci.Math.Romania Ser. 33(81), No.4,(1989) 343-346. (in colab.cu D Stefanescu). Zbl.Math. 729.11063. 14. About the exponent of an irreducible polynomial. Bull.Math.Soc. Sci.Math.Romania Ser.35(83),No.1/2,(1991) 119-124, (in colab.cu D Stefanescu). Zbl.Math. 755.11038. 15. The existence of a triangle with prescribed angle bisector lengths. Am.Math.Mon.101,No 1(1994),58-60(,in colab cu P Mironescu). M.R. 95h 11138. 16. Some polynomial factorisations over the integers. Bull.Math.Soc. Sci.Math.Romania Ser. 37,No.3-4,(1993) 127-131. (in colab.cu D Stefanescu). Zbl.Math.849.11082. 17. About a polynomial index and its applications. Bull.Math.Soc. Sci.Math.Romania Ser.37,No.1-2,(1993) 85-91, (in colab.cu D Stefanescu). Zbl.Math. 852.12001. 18. Bounds for heigts of integer polynomial factors. J Univ. Comp. Sci. 1 Nr.8 599-609, (in colab.cu D Stefanescu).(1995) M.R.97d 1191. 19.Several approximation of π (x) Math.Inequal.Appl.2 No.3,317-324,(1999) Zbl. Math. 990.53635. 20. Stable Polynomials and Applications to Polynomial factorisation, Analele Univ. Bucuresti seria Mat. Inf., XLVI,p.3-14,(1997) (in colaborare cu D. Stefanescu)Zbl.Math.99163526. 21.On the inequality pa pb >pab Bull.Math.Soc. Sci.Math Roumanie Tome 41(89) No.2,(1998) 135-140.Zbl.Math.99163521 22. On the inequality π (x) >x/ log x-1. Analele Univ. Bucuresti,seria Matematica,XLVII no.2 (1998), 187-192.Zbl.Math.99163515 23. Strong Bertrad s postulate revisited. Notes on Number Theory and Discret Mathematics 5,(1999),No.3,121-123.MR 1748060 24. An inequality concerning the prime numbers. Notes on Number Theory and Discret Mathematics 5,(1999),No.2,52-54,MR 1746720 25. Erdos-Turan problem for prime numbers in arithmetic progression. Math Reports Vol.1(51) No.4,(1999) 595-599 MR. 2002 d: 11112
26. Properties of positive integer sequences which are sum of two squares. Bull.Math.Soc. Sci.Math Roumanie Tome 42(90), No.2(1999).p125-132.Zbl.Math99163527 27. Asymptotical formulae for a(n)= n-ϕ(n). Bull.Math.Soc. Sci.Math Roumanie Tome 42(90). No.3 (1999),271-277.Zbl.Math.99163514 28.On Erdos-Prachar Theorem. Analele Univ. Bucuresti,seria Matematica,XLVIII,p 143-148, No.2,(1999).p143-148Zbl.Math 99163514 29. On a squarefree integers Bull.Math.Soc.Sci.Math.Roumanie Tome 43(91) No.1(2000), 19-23. MR 2002 k:11156 30.A formula for π(x) applied to a result of Koninck-Ivic, Nieuw Archiev voor Wiskunde vij serie nr.1, (2000),p. 55-57.MR 1760.776 31.On a problem of Erdös-Turan, Publicationes Mathematicae Debrecen (57/ 1-2( 2000), 85-89. MR.1771.674 32.Inequalities concerning the function π(x).applications. Acta Arithmetica XCIV.4 (2000), 373-381. MR.1779.949.Zbl.Math.99163524 33.Properties of the series of differences of prime numbers-publication du Centre de Recherches en Mathematique pures,neuchatel,serie 1,31,(2000) 21-38,MR 1783245 34.Minorations pour les measures de Mahler de certains polynomes particuliers. Journal de Theorie des Nombres de Bordeaux,12,(2000), 127-132. MR 2002 b:11151 35.Properties of the function γ(n). Publications du Centre de Recherches en Matematique pures Neuchâtel, 1,(32)(2001)25-31 serie 36. Asymptotic formulas involving π(x). Bull.Math.Soc.Sci.Math.Roumanie,Tome 43.no.2,(2000) 149-154 MR 2002 k: 11153 37.On a theorem of Edmund Landau. Analele Univ.Buc.seria Matematica,XLIX,No.1(2000)67-72 MR 1898 :362 38. On inequality related to Hardy-Littlewood s conjecture Analele Univ.Buc.seria Matematica,XLIX,No.2(2000)163-166 MR 1898:601 39.Inequalities on polynomial heights. Journal Of Inequalities in Pure & Applied Mathematics,Melbourne vol.2 Issue 1,Article 7(2001) (In colab cu D Stefanescu)MR 2002 a:11018
40.On some properties of the π*(x)- π(x) function. Notes on Number Theory and Discret Mathematics 6,(2000),No.1,23-27.MR1809279 41.On some properties concerning the function a(n)=n-ϕ(n) Bulletin of the Greek Math.Society,Vol 45 (2001),71-77.MR1952482(2003k:11008) 42.An Inequality involving the Prime Numbers. Publications of the Faculty Electrical Engineering Belgrad 11(2001),33-35 MR 2002 g:11009 43 Inequalities involving prime numbers Math.Reports Vol.3(53),No.3(2001) 251-256 Mr1929536(2003g:11008) 44 Some of the properties of the sequence of powers of prime numbers. The Rocky Mountain Journal of Mathematics 31, No.4, 1407-1415 (2001) MR 2002 k: 11156 45. On the equation n-ϕ (n)=m. Bull. Math. Soc. Sci. Math. Roumanie Tome 44 (92).No.1, 97-100 (2001) 46. Some properties of Liouville s function. Bull. Math. Soc. Sci. Math. Roumanie 44 (92).No.4, 365-370 (2001) 47. Checking of the Hardy-Littlewood s conjecture in specials cases. Revue Romaine de Mathematique Pures.et Appl. No.4 (2001)465-470 MR 1910309 48.Inequalities involving the sequence of composed numbers Publications du Centre de Recherches en Matematique pures Neuchâtel, 1(2002)19-25 serie 1,(33)No 49.Some generalizations for a theorem by Landau Math.Inequalities & Appl.(Zagreb)4 no 3 327-330(2001) MR 2002 l:11121 50. Generalizations for Landau s Theorem Analele Univ. Buc.Seria Matematica (LI) No.1, 71-76 (2002) 51. Some properties of the series of composite numbers JIPAM (Melbourne) 2 no 3 Article 38 (http://jipam.vu.edu.au (2002) MR 2002 j 11103 52. Consequences of a theoreme of Erdos-Prachar JIPAM (Melbourne) 2 no 3 Article 35 (http://jipam.vu.edu.au)(2002) MR 2002 j 11102 53.On the sequence (( pn) 2 pn-1p n+1) JIPAM (Melbourne) 3 no 4 Article 53(http://jipam.vu.edu.au)MR (2002)
54. A special case of the Hardy-Littlewood conjecture Math Reports 4(54) no 3, 265-268 (2002) 55. The sequence of the powers of prime numbers revised Math Reports 5(55) no 1, 85-91 (2003) 56. On the sequence of the powers of prime numbers Analele Univ. Buc. (LI) No 2, 149-152 (2002) 57. Quartic fields extension with no proper intermediate field Revue Roumaine de Mathematique Pure et Appl vol48, no1, 1-11(2003) (cu T.Albu)1-11. MR 1998057 58. Intervals containing prime numbers Notes on Number Theory and Discrete Mathematics vol.8, no4, 144-148(2002) 59. Erdös-Turán type inequalities JIPAM (Melbourne) 4 no1 Article 23 (http://jipam.vu.edu.au).(2003). MR1966003 60. On Oblath s problem Journal of Integer Sequences, vol.6, Article03.35 (2003) (cu A. Gica) 61. A result similar to a theorem of Lagrange Math Reports vol.6(56) no3, 45-50 (2003) (cu A. Gica) 62. On the representation of natural numbers as sums of squares Amer. Math. Monthly vol. 112, no.2, 168-171 (2005) 63. On the relation between the digital sum and product of a natural number Publications of the Faculty Electrical Engineering Belgrad, Ser. Mat.15, 66-71 (2004) 64. Additive properties for the sequence (r n ) n=1 Analele Univ. Buc., vol.52, Nr.1, 57-62 (2003) 65. Relationship between a natural number and its digital product Notes on Number Theory and Discrete Mathematics vol.10, no3, 68-71(2004) 66. Properties of the Atanassov function Advanced Studies in Contemporary Mathematics (Pusan)8, no.1, 55-58 (2004) 67. Properties of the restrictive factor Notes on Number Theory and Discrete Mathematics vol.10, no3, 68-71(2004) 68. New inequalities on Polynomial divisors JIPAM (Melbourne) vol.5, no4, Article 89 (http://jipam.vu.edu.au).(2004) (cu D. Stefanescu)
69. Some Asymptotic Formulas Involving Primes in Arithmetic Progression. Comentarii Mathematici Universitatis Sancti Pauli, vol.53, no.1, 23-35(2004) (cu: C. Cobeli, M. Vajaitu, A. Zaharescu) 70. Powerful numbers in sequences. Math. Reports 7/57, No.1 (2005), 57-63 (cu G. Mincu) 71. On a problem of Brocard. Bull. of London Math. Soc. 37 (2005) (cu A. Gica) 72. On a sequence related to powerful numbers. Analele Univ. Buc. No. 2 (2005) (cu G. Mincu) 73. On some properties of squarefree and squareful numbers. Bull. Math. Soc. Sci. Math Roumanie tome 49(97) no.1 (2006), 63-68 (cu G. Mincu) 74. Polynomial Factorization. Bull. Math. Soc. Sci. Math Roumanie tome 49(97) no.1 (2006), 69-75 (cu D. Stefanescu) 75. A minimum problem. Mathematical reflections, University of Texas, Issue 6 (2006) 76. Equations involving arithmetic functions Carpathian Journal of Mathematics vol. 2 no. 1-2 (2006), 91-98 (cu G. Mincu) 77. Properties of a sequence generated by positive integers. Bull. Math. Soc. Sci. Math. Roumanie, tome 50(98) no. 2 (2007), 131-137 (cu V. Copil) 78. A sequence attached to powerful numbers. Bull. Math. Soc. Sci. Math. Roumanie, tome 50(98) no. 3 (2007), 249-258 (cu V. Copil) 79. Properties of some functions connected to prime numbers. JIPAM, Vol. 9, Issue 1 (2008) (cu G. Mincu) 80. Properties of non powerful numbers. JIPAM, Vol. 9, Issue 1, (2008) (cu V. Copil) LUCRARI ACCEPTATE PTR PUBLICARE 81. On the quotient of the consecutive primes Mathematica Moravica () 82. Series involving the least and the greatest prime factor of a natural number MIA () (cu G. Mititica) 83. Some properties of the sequence of prime numbers. AADM (2008) (cu V.Copil)