Hongyu Zhang Stan Jarzabek Soe Myat Swe XVCL Approach to Separating Concerns in Product Family Assets. 36-47 2001 conf/gcse/2001 GCSE http://link.springer.de/link/service/series/0558/bibs/2186/21860036.htm db/conf/gcse/gcse2001.html#ZhangJS01