Gavin R. Finnie Gerhard E. Wittig Doncho I. Petkov Prioritizing software development productivity factors using the analytic hierarchy process. 129-139 1993 22 Journal of Systems and Software 2 http://dx.doi.org/10.1016/0164-1212(93)90091-B db/journals/jss/jss22.html#FinnieWP93