1. F. Klein andA. Sommerfeld:Uber die Theorie des Kreisels, Vol.1–4 (Leipzig, 1897–1910; New York, N. Y., 1965).
2. A. Gray:A Treatise on Gyrostatics and Rotational Motions (London, 1918; New York, N. Y., 1959).
3. T. Levi Civita andU. Amaldi:Lezioni di meccanica razionale, Vol.2, parte 2 (Bologna, 1952).
4. E. T. Whittaker:A Treatise on the Analytical Dynamics of Particles and Rigid Bodies, 4th edition (Cambridge, 1959).
5. V. V. Golubev:Lectures on Integration of the Equations of Motion of a Rigid Body about a Fixed Point (Moscow, 1953, in Russian); English translation by the Israel Program of Scient. Transl. (Jerusalem, 1960).