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@article{DA_1984_24_a3, author = {V. I. Kostin}, title = {Points of the extremum of a function}, journal = {Diskretnyj analiz i issledovanie operacij}, pages = {35--42}, publisher = {mathdoc}, number = {24}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DA_1984_24_a3/} }
V. I. Kostin. Points of the extremum of a function. Diskretnyj analiz i issledovanie operacij, no. 24 (1984), pp. 35-42. http://geodesic.mathdoc.fr/item/DA_1984_24_a3/