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@article{DE_1971_7_2_a20, author = {E. M. Markushin}, title = {The computation of the quadratic functional in a certain special case}, journal = {Differencialʹnye uravneni\^a}, pages = {368}, publisher = {mathdoc}, volume = {7}, number = {2}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1971_7_2_a20/} }
E. M. Markushin. The computation of the quadratic functional in a certain special case. Differencialʹnye uravneniâ, Tome 7 (1971) no. 2. http://geodesic.mathdoc.fr/item/DE_1971_7_2_a20/