Chomczyk, M. A. ., and Z. . Chomczyk. “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”. Zeszyty Naukowe UPH Seria Administracja I Zarządzanie, vol. 40, no. 113, May 2019, pp. 21-34, https://czasopisma.uph.edu.pl/znadministracja/article/view/319.