José Carlos Ferreira da Rocha, Fabio Gagliardi Cozman, Cassio Polpo de Campos. Inference in Polytrees with Sets of Probabilities. In Christopher Meek, Uffe Kjærulff, editors, UAI 03, Proceedings of the 19th Conference in Uncertainty in Artificial Intelligence, August 7-10 2003, Acapulco, Mexico. pages 217-224, Morgan Kaufmann, 2003.
Abstract is missing.