1.	Gh. Bordbar, S.M. Zebarjad and F. Shojaei Critical Behavior of Liquid 3He Int. J. Theor. Phys. 43 (2004), 1863-1873  [abstract]    Code: IPM/P-2004/026

2.	S.M. Zebarjad and M. Haghighat Relativistic Kinetic Vertex in Positronium  (Preprint) [abstract]    Code: IPM/P-2002/015

3.	N. Riazi, A. Azizi and S.M. Zebarjad Soliton Decay in Coupled System of Scalar Fields Phys. Rev. D 66 (2002), 065003  [abstract]    arXive.org link: hep-th/0202122 [ abs, src, ps, others], cited by Code: IPM/P-2002/087

4.	M. Haghighat, S.M. Zebarjad and F. Loran Positronium Hyperfine Splitting in Noncommutative Space at Order α6 Phys. Rev. D 66 (2002), 016005-1-4  [abstract]    arXive.org link: hep-ph/0109105 [ abs, src, ps, others], cited by Code: IPM/P-2001/036