스털링 엔진(공기 압축방식)

http://deu.ac.kr/~bychoi/link_stirling_engine.html

http://cyhome.cyworld.com/?home_id=a1887467&postSeq=1906214

http://cafe.naver.com/freeenergy.cafe?iframe_url=/ArticleRead.nhn%3Farticleid=160

http://blog.daum.net/knipia/8483058