Marco Sinnema Sybren Deelstra Jos Nijhuis Jan Bosch COVAMOF: A Framework for Modeling Variability in Software Product Families. 197-213 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3154&spage=197 2004 conf/splc/2004 SPLC db/conf/splc/splc2004.html#SinnemaDNB04