1. The contribution of free software to software evolution;Bauer,2003
2. L.A. Belady, M.M. Lehman, Programming system dynamics or the metadynamics of systems in maintenance and growth, IBM Res. Rept., T.J. Watson Res. Centre, Yorktown Heights, NY, RC 3546; Also as Chapter 5 in [21]
3. L.A. Belady, M.M. Lehman, An introduction to program growth dynamics, in: W. Freiburger (Ed.), Statistical Computer Performance Evaluation, Academic Press, New York, 503–511; Also as Chapter 6 in [21]
4. Software maintenance and evolution: A roadmap;Bennett,2000
5. Philosophical Foundations of Physics;Carnap,1966