Mikko Raatikainen Eila Niemelä Varvana Myllärniemi Tomi Männistö Svamp – An Integrated Approach for Modeling Functional and Quality Variability. 89-96 2008 VaMoS http://www.vamos-workshop.net/proceedings/VaMoS_2008_Proceedings.pdf conf/vamos/2008 db/conf/vamos/vamos2008.html#RaatikainenNMM08