1
by Zobel
Published 2004
2
by Davies
Published 2001
3
by Mandel
Published 2004
4
by Markel
Published 2015
5
by Davies
Published 2011
6
by Hackos
Published 1994
7
by ELLIS
Published 1997
8
9
Published 1995
10
by Davies
Published 1996
11
by EISENBERG
Published 1992
12
by Anderson, Paul V.
Published 1999