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3. On the use of difference schemes with splitting operator for solving the third boundary value problem in the case of parabolic type equation;Lebedev;Sibir. Matem. Zhurn.,1965
4. On convergence of difference schemes with splitting operator, approximating the third boundary value problem for parabolic equation;Andreev;Zhurn. Vychisl. Matem. and Matem. Fiz.,1969
5. Problèmes aux Limites non Homogènes et Application;Lions,1968