H. Washizaki, H. Yamamoto, и Y. Fukazawa. METRICS '03: Proceedings of the 9th International Symposium on Software Metrics, Washington, DC, USA, IEEE Computer Society, (2003)
C. Runciman, и I. Toyn. Proceedings of the Conference on Functional Programming Languages and
Computer Architecture '89, Imperial College, London, стр. 166--173. New York, NY, ACM, (1989)