1
2
by Masson, Paul R.
Published 1990
3
Published 1991
4
Published 1992
5
Published 1993
6
by Figgie, Harry E.
Published 1993
7
by Simai, Mihaly
Published 1995
8
Published 1992
9
Published 1995
10
by Leeb, Stephen
Published 2006
11
Published 1992
12
Published 2021
13
Published 2010
14
Published 1990
15
16
17
Published 2008
18
Published 2008
19
Published 2015
20