Douglas Stuart Wonhee Sull T. W. Cook Dependency Navigation in Product Lines Using XML. 82-93 2000 conf/iwsapf/2000 IW-SAPF http://link.springer.de/link/service/series/0558/bibs/1951/19510082.htm db/conf/iwsapf/iwsapf2000.html#StuartSC00