João Pedro Cordeiro, Gilberto Câmara, Ubirajara F. Moura, Cláudio C. Barbosa, Felipe Almeida. Algebraic Formalism over Maps. In Frederico T. Fonseca, Marco A. Casanova, editors, VII Brazilian Symposium on Geoinformatics, 20-23 November, Campos do Jordão, São Paulo, Brazil. pages 49-65, INPE, 2005. [doi]
Abstract is missing.