Albert L. Baker James M. Bieman Norman E. Fenton David A. Gustafson Austin Melton Robin W. Whitty A philosophy for software measurement. 277-281 1990 12 Journal of Systems and Software 3 http://dx.doi.org/10.1016/0164-1212(90)90050-V db/journals/jss/jss12.html#BakerBFGMW90