Youngbong Kim Mikyeong Moon Keunhyuk Yeom An Aspect-oriented Approach for Representing Variability in Product Line Architecture. 37-44 2007 VaMoS http://www.vamos-workshop.net/proceedings/VaMoS_2007_Proceedings.pdf conf/vamos/2007 db/conf/vamos/vamos2007.html#KimMY07