BREZINA, Ivan, ml. - DARMO, Ľubomír. Use of Preference Ranking Organization Method for Enrichment Evaluation for Comparison of European Union Countries. - Registrovaný: Web of Science. In SGEM 2015. International multidisciplinary scientific conference on social sciences and arts. SGEM 2015 : 2nd International multidisciplinary scientific conference on social sciences and arts, 26 aug. - 1 sept. 2015, Albena, Bulgaria. - Sofia : STEF92 Technology, 2015. ISBN 978-619-7105-47-6, s. 987-994. VEGA 1/0975/15, I-15-105-00.