Is dual quality of products legal or ethical problem?: empirical study of customers’ perceptions

VESELOVSKÁ, Lenka - ZIMERMANOVÁ, Katarína. Is dual quality of products legal or ethical problem?: empirical study of customers’ perceptions. In Economics and business management in the 21st century. international scientific conference. Economics and business management in the 21st century : 4th international scientific conference, Ostrava 28th-29th November, 2018. 1. vyd. - Ostrava : Vysoká škola báňská - Technická univerzita Ostrava, 2019. ISBN 978-80-248-4278-3, s. 295-302.