www.nl.go.kr
www.keric.net
www.knowledge.go.kr
www.kinds.or.kr
www.dbpia.co.kr
http://thesis.or.kr
http://cuir.car.chula.ac.th
www.riss4u.com
^^ Information by Kamon(M), Noppadol(Hong), Jittikran(p'ta)