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@article{FAA_1972_6_4_a9, author = {I. S. Gudovich and S. G. Krein}, title = {Elliptic boundary problems for the system}, journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a}, pages = {75--76}, publisher = {mathdoc}, volume = {6}, number = {4}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FAA_1972_6_4_a9/} }
I. S. Gudovich; S. G. Krein. Elliptic boundary problems for the system. Funkcionalʹnyj analiz i ego priloženiâ, Tome 6 (1972) no. 4, pp. 75-76. http://geodesic.mathdoc.fr/item/FAA_1972_6_4_a9/