Митрохин С. И. Spectral Properties of Boundary Value Problems for Functional-Differential Equations with Integrable Coefficients. – Differential Equations, 2010, Vol. 46, №8, pp. 1-9. Pleiades Publishing, Ltd., 2010. Original Russian Text: S. I. Mitrokhin, 2010, publishing in Differentsialnye Uravneniya, 2010, Vol. 46, №8, pp. 1085-1093.

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