https://www.stetson.edu/secure/apps/wordpress/?p=pmzatpkajd&paged=80
http://autos.ucsc.edu/forums/viewtopic.php?f=14&p=1240
http://opensees.berkeley.edu/community/viewtopic.php?f=3&t=46624
http://mgl.scripps.edu/forum/viewtopic.php?f=25&t=1774
http://moxie.cs.oswego.edu/~kole/phpBB3/viewtopic.php?f=15&t=139
http://buchberger.cs.lamar.edu/phpbb/viewtopic.php?f=3&t=7&start=170