00523nam a2200169Ia 4500008004100000100001800041245006400059245007000123260000900193300002200202440004500224500001100269650002100280650002000301650001100321650002100332170725s9999    xx            000 0 und d  aYangyang Zhao  aTowards an understanding of change types in bug fixing code  cYangyang Zhao, Hareton Leung, Yibiao Yang, Yuming Zhou, Baowen Xu  c2017  apages 37-53, June  aInformation and software technologyv86:  aCJ0031  a Empirical study  aBug fixing code  aChange  aSoftware quality