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@article{IVM_1988_4_a10, author = {A. L. Teptin}, title = {On the sign of the {Green} difference function}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {69--72}, publisher = {mathdoc}, number = {4}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1988_4_a10/} }
A. L. Teptin. On the sign of the Green difference function. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1988), pp. 69-72. http://geodesic.mathdoc.fr/item/IVM_1988_4_a10/