Changes

*Hazzan, O. and Tomayko, J. (2003). '''The reflective practitioner perspective in eXtreme Programming''', Proceedings of the XP Agile Universe 2003, New Orleans, Louisiana, USA, pp. 51-61.

* Theories, tools and research methods in program comprehension: past, present and future (Margaret-Anne Storey, University of Victoria, 2008) [http://webhome.cs.uvic.ca/~chisel/pubs/storey-pc-journal.pdf]