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@article{IM2_1984_23_2_a6, author = {N. G. Kruzhilin}, title = {An estimate of the variation of a~normal parameter of a~chain on a~pseudoconvex surface}, journal = {Izvestiya. Mathematics }, pages = {367--389}, publisher = {mathdoc}, volume = {23}, number = {2}, year = {1984}, language = {en}, url = {http://geodesic.mathdoc.fr/item/IM2_1984_23_2_a6/} }
N. G. Kruzhilin. An estimate of the variation of a~normal parameter of a~chain on a~pseudoconvex surface. Izvestiya. Mathematics , Tome 23 (1984) no. 2, pp. 367-389. http://geodesic.mathdoc.fr/item/IM2_1984_23_2_a6/