KOPČÁKOVÁ, Janka - PSZCZOLKA, Jan. Evaluation of Performance in the Selected Industry through Ratio Indicators. In Trends in Application of Statistical Methods for Quality Improvement XIX. (2022). International Scientific Conference. Trends in Application of Statistical Methods for Quality Improvement XIX. (2022) : Reviewed Proceeding of Posts from an 19. International Scientific Conference, July 27th – 29th, 2022, Košice - Rajecké Teplice. - Košice : KKM PHF, 2022. ISBN 978-80-225-4996-7, s. 69-80.