Paul Penzo
发表
R. Gershman,
Paul Penzo,
Alexandria Wiercigroch,
1999
.
Robert H. King,
Michael B. Duke,
Lee Johnson,
2003
.
Kerry T. Nock,
Paul Penzo,
2002
.
Robert H. King,
Michael B. Duke,
Mark K. Jacobs,
2003
.