Ismail, A. I., and T. S. Amer. “On the Motion of a Rigid Body in the Presence of a Gyrostatic Momentum”. Technische Mechanik - European Journal of Engineering Mechanics, vol. 21, no. 1, Sept. 2019, pp. 47-61, https://journals.ub.ovgu.de/index.php/techmech/article/view/1043.