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@article{IVM_1969_6_a1, author = {L. Kh. Burshtein}, title = {Extremal problems for certain classes of analytic functions.}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {9--16}, publisher = {mathdoc}, number = {6}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1969_6_a1/} }
L. Kh. Burshtein. Extremal problems for certain classes of analytic functions.. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1969), pp. 9-16. http://geodesic.mathdoc.fr/item/IVM_1969_6_a1/