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@article{MZM_1975_17_4_a15, author = {V. A. Khatskevich}, title = {On $J$-semiunitary operators in {Hilbertian} $J$-spaces}, journal = {Matemati\v{c}eskie zametki}, pages = {639--647}, publisher = {mathdoc}, volume = {17}, number = {4}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1975_17_4_a15/} }
V. A. Khatskevich. On $J$-semiunitary operators in Hilbertian $J$-spaces. Matematičeskie zametki, Tome 17 (1975) no. 4, pp. 639-647. http://geodesic.mathdoc.fr/item/MZM_1975_17_4_a15/