“УГOЛOBHOE ЛPABO MATEPAИЛbHOE И POIIECCY AЛbHOE”, CC&EEL, no. 2, pp. 71–77, Dec. 1963, Accessed: Jan. 30, 2026. [Online]. Available: https://czasopisma.inp.pan.pl/index.php/cceel/article/view/1659