KARKALÍKOVÁ, Marta - LACKOVÁ, Alica - KRNÁČOVÁ, Paulína. Implementation of Management Systems as an Important Environmental Factor within the European Market. - Registrovaný: Web of Science. In The Poprad Economic and Management Forum 2019 : Conference Proceedings from International Scientific Conference. - Ružomberok : VERBUM - vydavateľstvo Katolíckej univerzity v Ružomberku, 2019. ISBN 978-80-561-0671-6, s. 42-50. VEGA 1/0543/18.