1. A. A. Dorodnitsyn and N. A. Meller, ?Some approaches to solving stationary Navier-Stokes equations,? Zh. Vychisl. Mat. Mat. Fiz.,8, No. 2, 393?402 (1968).
2. E. I. Mateeva and B. V. Pel'tses,?Partition of regions in the solution of boundary-value problems for Poisson's equation in regions of complicated shape,? Zh. Vychisl. Mat. Mat. Fiz.,13, No. 6, 1441?1452 (1973).
3. V. G. Osmolovskii and V. Ya. Rivkind, ?The method of partition of regions for elliptic equations with discontinuous coefficients,? Zh. Vychisl. Mat. Mat. Fiz.,21, No. 1, 35?39 (1981).
4. J. L. Lions and E. Magenes, Nonhomogeneous Boundary-Value Problems and Applications, Grundlehren der mathematische Wissenschaften in Einzeldarstellungen, Bd. 181, Springer-Verlag, New York (1972).
5. I. C. Gohberg and M. G. Krein, Introduction to the Theory of Linear Nonselfadjoint Operators, Am. Math. Soc, Providence (1969).