7[2]SD Conte,H E Dunsmore,V Y Shen.Software Engineering Metrics and Models[M].Benjamin/Cummings publishing Company,1986:93-94.
8James S Collofello,Bakul P Gosalia.An Application of Causal Analysis to the Software Modification Proces[J].Software-practice and Experience,1993,23(10):1095-1105.
9John W Horch.Practical Guide to Software Quality Management [M].Norwood:Artech House,1996.
10Mark C Paulk,et al.Capability Maturity ModelSM for Software [R].Pittsburgh,Pennsylvania:Carnegie Mellon University,1993.