1. 题目：pricing perpetual American  catastrophe put options:a penalty function approach
作者：X. Sheldon Lin, Tao Wang
期刊：insurance:mathematics and economics. Volume 44, Issue 2, pp. 287-295 (2009)
链接：http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V8N-4W0SX9P-2&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=66d307cf1da7488e484a40a6a661cffa