Lionel C. Briand Christian Bunse John W. Daly A Controlled Experiment for Evaluating Quality Guidelines on the Maintainability of Object-Oriented Designs. 513-530 2001 27 IEEE Trans. Software Eng. 6 http://doi.ieeecomputersociety.org/10.1109/32.926174 db/journals/tse/tse27.html#BriandBD01