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@article{FPM_1997_3_1_a0, author = {V. G. Boltyanskii}, title = {The tents method and the theory of extremum}, journal = {Fundamentalʹna\^a i prikladna\^a matematika}, pages = {3--13}, publisher = {mathdoc}, volume = {3}, number = {1}, year = {1997}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FPM_1997_3_1_a0/} }
V. G. Boltyanskii. The tents method and the theory of extremum. Fundamentalʹnaâ i prikladnaâ matematika, Tome 3 (1997) no. 1, pp. 3-13. http://geodesic.mathdoc.fr/item/FPM_1997_3_1_a0/