Contains the keyword developer characterization

Amor JJ, Robles G, Gonzalez-Barahona JM. Effort Estimation by Characterizing Developer Activity. In Proceedings of the 2006 International Workshop on Economics Driven Software Engineering Research [Internet]. New York, NY, USA: ACM; 2006. pp. 3–6. http://doi.acm.org/10.1145/1139113.1139116