1. DeMarco T. Controlling Software Projects: Management, Measurement, and Estimates. Englewood Cliffs, N.J.: Prentice-Hall PTR, 1986.
2. Ramamoorthy C V, Tsai W T, Yamaura T, Bhide A.Metrics guided methodology. In Proc. the 9th Int. Comp. Softw. Appl. Conf., Chicago, USA, Oct. 9-11, 1985, pp.111–120.
3. Chidamber S R, Kemerer C F. A metrics suite for objectoriented design. IEEE Trans. Softw. Eng., 1994, 20(6): 476–493.
4. Fernando Brito e Abreu, Regério Carapuça. Object-oriented software engineering: Measuring and controlling the development Process. In Proc. the 4th Int. Conf. Softw. Qual. (ICSQ 1994), McLean, USA, Oct. 3-5, 1994, pp.1–8.
5. Brain H S. Object-Oriented Metrics: Measures of Complexity. Englewood Cliffs, N.J.: Prentice-Hall PTR, 1996.