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@article{DAN_1985_283_6_a2, author = {I. K. Daugavet}, title = {Causal extension of operators}, journal = {Doklady Akademii Nauk}, pages = {1299--1301}, publisher = {mathdoc}, volume = {283}, number = {6}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1985_283_6_a2/} }
I. K. Daugavet. Causal extension of operators. Doklady Akademii Nauk, Tome 283 (1985) no. 6, pp. 1299-1301. http://geodesic.mathdoc.fr/item/DAN_1985_283_6_a2/