Trends in Application of Statistical Methods for Quality Improvement XXI. (2023). International Scientific Conference. Trends in Application of Statistical Methods for Quality Improvement XXI. (2023) : Reviewed Proceeding of Posts from an 21. International Scientific Conference, February 15th - 17th, 2023, Košice - Kaluža. 1st Edition. Košice : KKM PHF, 2023. CD-ROM 132 s. ISBN 978-80-225-5044-4.