Sholom Cohen Dave Zubrow Gary J. Chastek Developing a Measurement Program for Software Product Lines. 318 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3154&spage=318 2004 conf/splc/2004 SPLC db/conf/splc/splc2004.html#CohenZC04