Leon Moonen Arie van Deursen Andy Zaidman Magiel Bruntink On the Interplay Between Software Testing and Evolution and its Effect on Program Comprehension. 173-202 2008 Software Evolution http://dx.doi.org/10.1007/978-3-540-76440-3_8 series/springer/2008Mens db/series/springer/Mens2008.html#MoonenDZB08