Giuliano Antoniol Massimiliano Di Penta Ettore Merlo An Automatic Approach to identify Class Evolution Discontinuities. 31-40 2004 conf/iwpse/2004 IWPSE http://csdl.computer.org/comp/proceedings/iwpse/2004/2211/00/22110031abs.htm db/conf/iwpse/iwpse2004.html#AntoniolPM04