Rick Rabiser Deepak Dhungana Paul Grünbacher Benedikt Burgstaller Value-Based Elicitation of Product Line Variability: An Experience Report. 73-79 2008 VaMoS http://www.vamos-workshop.net/proceedings/VaMoS_2008_Proceedings.pdf conf/vamos/2008 db/conf/vamos/vamos2008.html#RabiserDGB08