„ON KURATOWSKI MEASURE OF NONCOMPACTNESS IN R 2 WITH THE RIVER METRIC“ (2020) Balkan Journal of Applied Mathematics and Informatics, 3(2), S. 59–68. Verfügbar unter: https://js.ugd.edu.mk/index.php/bjami/article/view/3666 (Zugegriffen: 3 Oktober 2025).