Drygaś, Pawel Construction of some types of uninorms. In: Palma : Universitat de les Illes Balcars, 2009. -- AGOP 2009 : Proceedings of the Fifth International Summer School on Aggregation Operators.Palma,Spain,6.-10.7.2009. -- s.189-193. -- 978-84-8384-101-3.