C. Torres, P. Perrot, and H. Talbot. conference on Biometrical Feature Identification and Analysis (BFIA), Göttingen, (September 2007)URL: http://www.stochastik.math.uni-goettingen.de/biometrics2007/talks/Torres.pdf.
O. Tankyevych, H. Talbot, P. Dokladal, and N. Passat. Mathematical Morphology and Its Application to Signal and Image Processing, Proceedings of the 9th International Symposium on Mathematical Morphology (ISMM) 2009, page 137--148. Groningen, The Netherlands, (2009)