1. M. Abramowitz and I. A. Stegun (editors), Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, Dover, New York (1972).
2. V. L. Aleksandrov, “Vortex theory,” in: L. K. Martins (editor), Technical Encyclopedia [in Russian], Vol. 3, Sovetskaya Entsiklopediya, Moscow (1928), pp. 774–779.
3. V. L. Aleksandrov, Engineering Hydromechanics [in Russian], Gostekhizdat, Moscow (1946).
4. N. N. Andreev, “Vortex motions,” in: Grand Soviet Encyclopedia [in Russian], Vol. 1, Sovetskaya Entsiklopediya, Moscow (1930), pp. 339–350.
5. V. A. Andryushchenko and M. V. Meshcheryakov, “Dynamics of the interaction of two coaxial vortex rings in the case of natural convection,” Izv. Akad. Nauk SSSR, Ser. Mekh. Zhidkosti Gaza, No. 4, 169–171 (1991).