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@article{MZM_1981_30_2_a12, author = {L. I. Sazonov}, title = {Normal solvability of two-dimensional {Toeplitz} operators}, journal = {Matemati\v{c}eskie zametki}, pages = {261--268}, publisher = {mathdoc}, volume = {30}, number = {2}, year = {1981}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1981_30_2_a12/} }
L. I. Sazonov. Normal solvability of two-dimensional Toeplitz operators. Matematičeskie zametki, Tome 30 (1981) no. 2, pp. 261-268. http://geodesic.mathdoc.fr/item/MZM_1981_30_2_a12/