1.	R. Mansouri and K. Nozari A New Distributional Approach to Signature Change Gen. Relat. Gravit. 32 (2000), 253-269  [abstract]    arXive.org link: gr-qc/9806007 [ abs, src, ps, others], cited by Code: IPM/P-1998/009

2.	R. Mansouri and K. Nozari Signature Change, Inflation and the Cosmological Constant  (Preprint) [abstract]    arXive.org link: gr-qc/9806109 [ abs, src, ps, others], cited by Code: IPM/P-1998/015

3.	R. Mansouri and K. Nozari Lightlike Hypersurfaces of Discontinuity and Distributional Method  (Preprint) [abstract]    Code: IPM/P-1998/008

4.	R. Mansouri and K. Nozari Rotation of Plane of Polarization of An Electromagnetic Wave Propagation Over Cosmological Distances  (Preprint) [abstract]    arXive.org link: gr-qc/9710028 [ abs, src, ps, others], cited by Code: IPM/P-1997/027