Where can I find information on actual psychological work done on alien abduction experiences, not quack crap?

I was trying to find some information performed by psychologists on the phenomenon of Alien abductions. The problem is that most of what's out there is questionable at best, and at worst is meant to help someone who exploits it make a buck. I'm not a believer in the phenomenon, and would like to know if it's been debunked by actual scientists. Is there a source for that kind of information?Where can I find information on actual psychological work done on alien abduction experiences, not quack crap?here is a good place to start:

http://www.skepdic.com/

they have a listing for alien abductions

http://www.skepdic.com/aliens.html