José Braz, Alpesh Ranchordas, Helder Araújo, Joaquim A. Jorge: Advances in Computer Graphics and Computer Vision - International Conferences VISAPP and GRAPP 2006, Setúbal, Portugal, February 25-28, 2006, Revised Selected Papers. Communications in Computer and Information Science 4, Springer 2007, ISBN 978-3-540-75272-1