Ismail, Abdel. “A MOTION OF A FAST SPINNING RIGID BODY ABOUT A FIXED POINT IN A SINGULAR CASE”.
Ann. Sofia Univ. Fac. Math. and Inf.
90 (December 12, 1998): 149–164. Accessed April 9, 2025. https://annual.uni-sofia.bg/index.php/fmi/article/view/293.