Geodesic
Estimation of operator norms in eigenvalue problems for equations with discontinuous operators
Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, Tome 11 (2011) no. 4, pp. 41-45.

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Existence of solutions of problems with a spectral parameter for the equations with discontinuous operators is considered. The estimations of the operator norms for these problems are received. Dirichlet problem for the higher-order elliptic equation with discontinuous nonlinearity is considered as an appendix. 
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D. K. Potapov. Estimation of operator norms in eigenvalue problems for equations with discontinuous operators. Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, Tome 11 (2011) no. 4, pp. 41-45. http://geodesic.mathdoc.fr/item/ISU_2011_11_4_a5/

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