Piperevski, Boro. “ON EXISTENCE AND CONSTRUCTION OF A POLYNOMIAL SOLUTION OF A CLASS OF SECOND ORDER DIFFERENTIAL EQUATIONS’ SYSTEMS”. Matematichki Bilten 25, no. 1 (January 1, 2001): 37–42. Accessed August 14, 2026. https://bilten.smm.org.mk/index.php/bilten/article/view/1663.