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@article{AA_1991_3_2_a3, author = {V. A. Kozlov and V. G. Maz'ya}, title = {On the spectrum of an operator pencil generated by the {Neumann} problem in a~cone}, journal = {Algebra i analiz}, pages = {111--131}, publisher = {mathdoc}, volume = {3}, number = {2}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AA_1991_3_2_a3/} }
V. A. Kozlov; V. G. Maz'ya. On the spectrum of an operator pencil generated by the Neumann problem in a~cone. Algebra i analiz, Tome 3 (1991) no. 2, pp. 111-131. http://geodesic.mathdoc.fr/item/AA_1991_3_2_a3/