Asma Mubarak Steve Counsell Robert M. Hierons Youssef Hassoun Package Evolvability and its Relationship with Refactoring. 2007 8 ECEASST http://eceasst.cs.tu-berlin.de/index.php/eceasst/article/view/120 db/journals/eceasst/eceasst8.html#MubarakCHH07