Geodesic
Nonlocal combined problem of Bitsadze–Samarski and Samarski–Ionkin type for a system of pseudoparabolic equations
Vladikavkazskij matematičeskij žurnal, Tome 16 (2014) no. 1, pp. 30-41 
I. G. Mamedov. Nonlocal combined problem of Bitsadze–Samarski and Samarski–Ionkin type for a system of pseudoparabolic equations. Vladikavkazskij matematičeskij žurnal, Tome 16 (2014) no. 1, pp. 30-41. http://geodesic.mathdoc.fr/item/VMJ_2014_16_1_a3/
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     title = {Nonlocal combined problem of {Bitsadze{\textendash}Samarski} and {Samarski{\textendash}Ionkin} type for a~system of pseudoparabolic equations},
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Voir la notice de l'article provenant de la source Math-Net.Ru

We consider a boundary value problem for a fourth order system of pseudoparabolic equations with discontinuous coefficients and with conditions Bicadze–Samarsky and Samarsky–Ionkin. We find integral representation for a functions in the Sobolev space, which allows one to recover it through the values of certain operators (defining operators), taken at the function. We also justify formulation of the Goursat problem with nonclassical boundary conditions.

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