E. Horvitz, H. Suermondt, and G. Cooper. Proceedings of the Fifth Workshop on Uncertainty in Artificial Intelligence, page 182--193. Windsor, Ontario, (August 1989)
A. Grover, A. Kapoor, and E. Horvitz. Proceedings of the 21th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, page 379--386. New York, NY, USA, ACM, (2015)
J. Krumm, and E. Horvitz. Mobile and Ubiquitous Systems: Networking and Services, 2004. MOBIQUITOUS 2004. The First Annual International Conference on, page 4-13. (August 2004)