McCallum, A., Wang, X. & Corrada-Emmanuel, A. (2007). Topic and role discovery in social networks with experiments on enron and academic email. Journal of Artificial Intelligence Research, 30, 249--272.

Craven, M., DiPasquo, D., Freitag, D., McCallum, A., Mitchell, T., Nigam, K. & Slattery, S. (2000). Learning to Construct Knowledge Bases from the World Wide Web. Artificial Intelligence, 118, 69--113.

Rennie, J. & McCallum, A. (1999). Using reinforcement learning to spider the Web efficiently. 16th International Conference on Machine Learning (p./pp. 335--343), . ISBN: 90-74821-43-X