1. A. A. Davydov, B. N. Chetverushkin, and E. V. Shil’nikov, Comput. Math. Math. Phys. 50, 2157–2165 (2010).
2. O. A. Ladyzhenskaya, The Boundary Value Problems of Mathematical Physics (Nauka, Moscow, 1984; Springer-Verlag, New York, 1985).
3. O. A. Ladyzhenskaya, V. A. Solonnikov, and N. N. Ural’tseva, Linear and Quasilinear Equations of Parabolic Type (Nauka, Moscow, 1967; Am. Math. Soc., Providence, R.I., 1968).
4. S. I. Repin, Tr. Sankt-Peterb. Mat. Ob-va 9, 148–179 (2001).
5. B. N. Chetverushkin, Mat. Model. 24(11), 33–52 (2012).