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@article{DE_1974_10_1_a14, author = {R. S. Saks}, title = {Boundary value problems for certain systems that can be reduced to elliptic systems}, journal = {Differencialʹnye uravneni\^a}, pages = {132--142}, publisher = {mathdoc}, volume = {10}, number = {1}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1974_10_1_a14/} }
R. S. Saks. Boundary value problems for certain systems that can be reduced to elliptic systems. Differencialʹnye uravneniâ, Tome 10 (1974) no. 1, pp. 132-142. http://geodesic.mathdoc.fr/item/DE_1974_10_1_a14/