21
22
Published 2006
23
24
Published 1997
25
Published 1995
26
27
Published 1994
28
Published 1997
29
Published 1974
30
Published 1977
31
Published 1986
32
Published 1990
33
Published 1997
34
Published 1991
35
Published 1994
36
Published 1990
37
Published 1991
38
by Simai, Mihaly
Published 1995
39
Published 1978
40
Published 1973