Fred Schaefer
发表
R van Basshuysen,
Fred Schaefer,
R. V. Basshuysen,
2004
.
Fred Schaefer,
Madhu Mahalingam,
Elisabeth Morlino,
2009
.
Fred Schaefer,
Richard Van Basshuysen,
R. V. Basshuysen,
2007
.