?url_ver=Z39.88-2004&rft_id=doi%3A10.1145%2F2648511.2648520&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Tribastone%2C+Mirco&rft.aufirst=Mirco&rft.aulast=Tribastone&rft.date=2014&rft.btitle=Proceedings+of+the+18th+International+Software+Product+Line+Conference+on+-+SPLC+'14&rft.title=Behavioral+relations+in+a+process+algebra+for+variants&rft.isbn=978-1-4503-2740-4&rft.genre=bookitem