1
by Alp, Ilker, 1953-
Published 1988
2
Published 1993
3
by Pundeff, Marin V.
Published 1994
4
by Brown, J. F, 1928-
Published 1970
5
by Dimitrov, Vesselin, 1974-
Published 2001
6
Published 1986
7
by Eminov, Ali
Published 1997
8
Published 1982
9
by Dellin, L. A. D.
Published 1957
10
by Blagoeva, Stella
Published 1961