Hidalgo, José María Gómez ; Bringas, Guillermo Cajigas ; Sánz, Enrique Puertas ; García, Francisco Carrero: Content based SMS spam filtering. In: DocEng '06: Proceedings of the 2006 ACM symposium on Document engineering. New York, NY, USA : ACM Press, 2006. - ISBN 1-59593-515-0, S. 107--114