1. S. L. Sobolev, Introduction to the Theory of Cubature Formulas (Nauka Moscow, 1974) [in Russian].
2. O. A. Ladyzhenskaya, Mathematical Questions of the Dynamics of a Viscous Incompressible Fluid (Nauka Moscow, 1970) [in Russian].
3. V. S. Vladimirov, Equations of Mathematical Physics (Nauka Moscow, 1988) [in Russian].
4. V. V. Kozlov, General Vortex Theory (Udmurd. Univ. Izhevsk, 1998) [in Russian].
5. V. P. Mikhailov, Partial Differential Equations (Nauka Moscow, 1975) [in Russian].