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@article{DAN_1970_195_6_a4, author = {V. N. Logvinenko and I. V. Ostrovskii and L. I. Ronkin}, title = {Analytic transformations of a normal vector}, journal = {Doklady Akademii Nauk}, pages = {1270--1273}, publisher = {mathdoc}, volume = {195}, number = {6}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1970_195_6_a4/} }
V. N. Logvinenko; I. V. Ostrovskii; L. I. Ronkin. Analytic transformations of a normal vector. Doklady Akademii Nauk, Tome 195 (1970) no. 6, pp. 1270-1273. http://geodesic.mathdoc.fr/item/DAN_1970_195_6_a4/