Using the elements from a fuzzy sets theory in the process of diagnosing the loyalty of consumers of motor transport services Journal title: Восточно-Европейский журнал передовых технологий Authors: Iryna Fedotova, Oksana Kryvoruchko, Volodymyr Shynkarenko, Nadiia Bocharova, Liudmyla Sotnychenko, S... Subject(s):