Hryshyn D, Borovska T, Kalizhanova A. ELABORATION AND RESEARCH OF A MODEL OF OPTIMAL PRODUCTION AND DEVELOPMENT OF INDUSTRIAL SYSTEMS TAKING INTO ACCOUNT THE USE OF THE EXTERNAL RESOURCES. IAPGOS [Internet]. 2022 Dec. 30 [cited 2024 May 1];12(4):60-6. Available from: https://ph.pollub.pl/index.php/iapgos/article/view/3248