1  Case-Study Method in Small Business and Entrepreneurial Research  Mapping Boundaries and Perspectives
Lew Perren
International Small Business Journal     February 2004     vol. 22   no. 1    83-101

http://isb.sagepub.com/content/22/1/83.abstract

2   
The Case Study Method for Research in Small-and Medium-Sized Firms

International Small Business Journal     October 1996   vol. 15    no. 1    73-85

  http://isb.sagepub.com/content/15/1/73.extract

谢谢！！！