[6] H. Doostie , Generalized Fibonacci length, Proc. of 27th Annual Iranians Mathematics Conference, 1996.
[7] H. Doostie , Two classes of one-relator product of semigroups, Proc. of 28th Anual Iranian Mathematics Conference, (Tabriz Univ.), 153-158, 1997.
[8] H. Doostie , An Identitifaction property in semigroups, Proc. of 28th Annual Iranians Mathematics Conference, (Tabriz Univ.), 213-219, 1997.
[9] H. Doostie and M. Hashemi, Two questions on the symmetric properties of semigroups, Proc. of 30th Annual Iranian Mathematics Conference, 1999.
[10] H. Doostie and C. M. Campbell, Fibonacci length of automorphism groups involving the Tribonacci numbers, Vietnam J. of Math. 28, 57-65, 2000.
[11] H. Doostie and R. Golami, Computing on the Fibonacci length of finite groups, Internat. J. Appl. Math. 4:2, 149-156, 2000.
[12] C.M.Campbell, P.P.Campbell, H. Doostie and E.F.Robertson, On the Fibonacci length of powers of dihedral groups, In: Applcation of Fibonacci Numbers 9, 69-75, 2000.
[13] H. Doostie , R.Golami and R.M. Thomas, Certain extensions of (l,m,n,k)-groups, Southeast Asian Bull. of Math. 27: 1, 21-34, 2003.
[14] C.M.Campbell, P.P.Campbell, H. Doostie and E.F.Robertson, Fibonacci length for certain metacyclic groups, Algebra Colloquium 11:2, 215-229, 2004.
[15] H. Doostie and M. Maghasedi, Fibonacci length of direct product of groups, Vietnam J. of Math. 33:2, 189-197, 2005.
[16] H. Doostie and M. Maghasedi, On the Fibonacci length of symmetric groups, Internat. Rev. Pure Appl. Math., 1:2, 155-163, 2005.
[17] H. Doostie and M. Hashemi, On the n-permutation property in semigroups and categories, Fareast J. of Mathematical Sciences 19:2, 2005.
[18] H. Doostie and M. Maghasedi, On the group Aut(Sn), Proc. 36th Annual Iranians Mathematics Conference, 2005.
[19] H. Doostie and M. Hashemi, Fibonacci lengths involving the Wall number k(n), J. Appl. Math. and Computing 20:1-2, 171-180, 2006.
[20] H. Doostie and L. Pourfaraj, On the minimal ideals of commuting regular rings and semigroups, Internat. J. of Appl. Mathematics , 19:2, 201-216, 2006.
[21] H. Doostie and P.P.Campbell, On the commutator lengths of finitely presented groups, Internat. J. of Mathematics and Mathematical Sciences (IJMMS), Vol. 2006
[22] H. Doostie and A.T. Adnani, Fibonacci length of certain nilpotent 2-groups, Acta Mathematica Sinica, 23, No. 5, 879-884, 2007.
[23] H. Doostie and M. Hashemi, An application of the Fibonacci length, Internat. Mathematical Forum 2:27, 2007.
[24] M. Hashemi and H. Doostie, An application of the Fibonacci lengths on graphs, Korean Annals of Math., 24, 49-56, (2007).
[25] H. Doostie and L. Pourfaraj, Finite rings and Loop rings involving the commuting regular elements, Internat. Mathematical Forum 2:52, 2579-2586, 2007.
[26] M. Azadi, H. Doostie and L. Pourfaraj, Certain rings and semigroups examining the regularity property, J. Mathematics, Statistics and Alleid Fields, 2:1, 1-6, 2008.
[27] H. Doostie and M. Maghasedi, Certain classes of groups with commutativity degree < 0.5, Ars Combinatoria, 89, 263-270, (2008).
[28] A. Sadeghieh and H. Doostie, The n-th roots of elements in finite groups, Mathematical Sciences (Quarterly Journal) 2:4, 347-356, (2008).
[29] K. Ahmadidelir, C.M.Campbell and H. Doostie , Two classes of finit semigroups and monoids involving Lucas numbers, Semigroup Forum, 78:2, 200-209, (2009).
[30] H. Doostie and A. Sadeghieh, On the identification of subsemigroups of Transformation semigrous, J. of Mathematical Sciences: Advances& Applications 2:2, 245-256, 2009.
[31] H. Doostie , and K. Ahmadidelir, A class of Z-metacyclic groups involving Lucas numbers, Novi-Sad J. of Math., 39:1, 21-29, 2009.
[32] A. Sadeghieh and H. Doostie, Fibonacci length and the nth-root elements of Hamiltonian groups, Internat. Mathematical Forum, 4:39, 1923-1938, 2009.