Here is a good site...

http://www.crisisprevention.com/

There have been some discussion about restraints and alternatives on the COPPA site..

And some others:

http://www.ag.ohio-state.edu/~brick/cpirevw.htm

http://www.cmionline.org/

http://www.cwla.org/programs/groupcare/ncpi.htm

Goood Luck!