标题：Assessing influence in multiple linear regression with incomplete data
作者：Weichung J Shih, Sanford Weisberg  
出版社：American Society for Quality Control and American Statistical Association
链接：http://portal.acm.org/citation.cfm?id=12718.12723&coll=GUIDE&dl=GUIDE&CFID=64481757&CFTOKEN=89521187