[1]
D. Dimitrovski, B. Piperevski, and B. Ilievski, “SECOND MACEDONIAN SIMPOSIUM OF DIFFERENTIAL EQUATIONS”, Mat. Bilt., vol. 17, no. 1, pp. 125–128, Jan. 1993, Accessed: Aug. 14, 2026. [Online]. Available: https://bilten.smm.org.mk/index.php/bilten/article/view/1508