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@article{DAN_1980_255_4_a0, author = {Yu. Sh. Abramov}, title = {Duality in extremal problems generated by spectral problems for operator pencils}, journal = {Doklady Akademii Nauk}, pages = {777--780}, publisher = {mathdoc}, volume = {255}, number = {4}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1980_255_4_a0/} }
Yu. Sh. Abramov. Duality in extremal problems generated by spectral problems for operator pencils. Doklady Akademii Nauk, Tome 255 (1980) no. 4, pp. 777-780. http://geodesic.mathdoc.fr/item/DAN_1980_255_4_a0/