1. Ovsiannikov, L. V., New Solutions of Hydrodynamic Equations, Dokl. Akad. Nauk SSSR, 1956, vol. 111, p. 47–49.
2. Dyson, F. J., Dynamics of a Spinning Gas Cloud, J. Math. Mech., 1968, vol. 18, p. 91–101.
3. Gaffet, B., Spinning Gas Clouds: Liouville Integrability, J. Physics A: Math. Gen., 2001, vol. 34, pp. 2097–2109.
4. Ince, E. L., Ordinary Differential Equations, 1956, New-York: Dover.
5. Painlevé, P., C.R. Acad. Sci. Paris, 1902, vol. 135, p. 1020.