4
by Gargar, Kim A.
Published 2002
Thesis
5
6
by Joshi, Pankaj S.
Published 1993
Book
7
8
by Hawking, Stephen
Published 1990
Book
9
by Hawking, S. W. (Stephen W.)
Published 1987
Book
12
by Birrell, N. D.
Published 1982
Book
13
14
15
16
Published 1974
Book
17
18
20