Chomczyk, M. A. ., & Chomczyk, Z. . (2019). A model of a computerized information system based on the UML language as one of the elements of the environmental management system optimization fulfilling the requirements of the PN-EN ISO14001:2015-09 standard, in the context of the businessperformance. Management and Administration Journal, 40(113), 21-34. https://czasopisma.uph.edu.pl/znadministracja/article/view/319