Year of Publication
2008
30
2002
26
1997
24
2005
24
2009
24
1998
23
1999
23
1993
22
2001
22
2003
22
2011
22
1994
21
2006
21
1996
20
2000
19
2004
19
1985
18
1992
18
1990
17
1987
16
1991
16
1995
16
2007
15
2010
15
2012
14
2017
13
1988
12
1989
12
2013
12
2018
12
1965
11
1980
10
1982
10
2019
10
1984
9
1986
9
2015
9
1976
8
1977
8
1968
7
1983
7
2014
7
2016
7
1966
6
1969
6
1978
6
2020
6
1958
5
1959
5
1963
5
more ...