原文由 asromatotti 发表:
http://openurl.ingenta.com/content?genre=article&issn=1546-198X&volume=6&issue=6&spage=836&epage=839
http://openurl.ingenta.com/content?genre=article&issn=1546-198X&volume=6&issue=6&spage=916&epage=919
http://openurl.ingenta.com/content?genre=article&issn=1546-198X&volume=6&issue=6&spage=1005&epage=1009