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@article{FAA_1967_1_4_a11, author = {A. S. Markus and V. A. Prigorskii}, title = {Chains of projectors, similar to orthogonal}, journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a}, pages = {86--87}, publisher = {mathdoc}, volume = {1}, number = {4}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FAA_1967_1_4_a11/} }
A. S. Markus; V. A. Prigorskii. Chains of projectors, similar to orthogonal. Funkcionalʹnyj analiz i ego priloženiâ, Tome 1 (1967) no. 4, pp. 86-87. http://geodesic.mathdoc.fr/item/FAA_1967_1_4_a11/