M. Balabanović, and Y. Shoham. Proceedings of the AAAI Spring Symposium on Information Gathering from Heterogenous, Distributed Resources, page 13--18. (1995)
M. Balabanovic, and Y. Shoham. Proceedings of the AAAI Spring Symposium on Information Gathering from Heterogeneous, Distributed Environments, (1995)Stanford, CA.