Shahinyan, Smbat G. “ON OPTIMAL STABILIZATION OF PART OF VARIABLES OF ROTARY MOVEMENT OF A RIGID BODY WITH ONE FIXED POINT IN THE CASE OF SOPHIA KOVALEVSKAYA”. Proceedings of the YSU A: Physical and Mathematical Sciences, vol. 57, no. 2 (261), July 2023, pp. 51-61, doi:10.46991/PYSU:A/2023.57.2.051.