FSTA 2012 : abstracts of the eleventh international conference on fuzzy set theory and applications, Liptovský Ján, January 30 - February 3, 2012. Ed. Erich Peter Klement, Peter Struk ... [et al.]. 1. vyd. Liptovský Mikuláš : Armed Forces Academy of General M. R. Štefánik, 2012. ISBN 978-80-8040-438-3.