1. 标题：Bounds on Treatment Effects from Studies with Imperfect Compliance
    作者：Alexander Balke , Judea Pearl
    出版社：Journal of the American Statistical Association, Vol. 92, 1997
    电子链接：http://www.questia.com/googleScholar.qst;jsessionid=K2vBbWtKknNdnjBrgyNvSFHJTR1QJshLK2SqJtkcT2ZPsYCp1vdl!1795388119!-1366559283?docId=5002252740
2. 标题：Job seeking, reemployment, and mental health: A randomized field experiment in coping with job loss.
    作者：Caplan, Robert D.; Vinokur, Amiram D.; Price, Richard H.; Van Ryn, Michelle
    出版社：Journal of Applied Psychology. Vol 74(5), Oct 1989, 759-769.
    电子链接：http://psycnet.apa.org/index.cfm?fa=buy.optionToBuy&id=1990-06244-001&CFID=3419599&CFTOKEN=80094303[/url]