Rajović, D. Dimitrovski, B. Ilievski, M. “SUR 1’EQUATION DIFFERENTIELLE ARE‘OLAIRE LINE’AIRE AUX COEFICIENTS CONSTANTS -L’EQUATION AREOLAIRE D’EULER”. Matematichki Bilten, vol. 16, no. 1, Jan. 1992, https://bilten.smm.org.mk/index.php/bilten/article/view/1514.