If you have trouble locating any of these papers please contact an author for a reprint. A few of the later G.P. Srivastava Group papers are available as on line Postscript documents.
G P Srivastava
Inst Phys Conf Ser No 91: Chapter 6 (int Symp GaAs and Related Compounds, Heraklion, Greece, 1987) 529-532
A C Ferraz and G P Srivastava
Surf Sci 182, 161-178 (1987).
G P Srivastava, S Ciraci and I P Batra
Surf Sci 183, L290-L296 (1987).
G P Srivastava and A C Ferraz
Surf Sci 189/190, 913-918 (1987).
G P Srivastava, J L Martins and A Zunger
Phys Rev B 36, 2902-2905 (1987).