2
Published 1969
Journal
4
5
Published 2010
Journal
6
Published 2010
Journal
7
Published 2010
Journal
10
Published 2007
Journal
11
12
Published 2008
Journal
13
Published 2008
Journal
14
Published 2008
Journal
15
Published 1998
Journal
16
Published 2008
Journal
17
Published 2008
Journal
18
19
Published 2007
Journal
20
Published 1990
Journal