Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MO_2019_90_2_a1, author = {V. I. Voytitsky and A. Sh. Mustafaeva}, title = {Solution of extremal problems without use of derivative}, journal = {Matemati\v{c}eskoe obrazovanie}, pages = {7--19}, publisher = {mathdoc}, volume = {90}, number = {2}, year = {2019}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MO_2019_90_2_a1/} }
V. I. Voytitsky; A. Sh. Mustafaeva. Solution of extremal problems without use of derivative. Matematičeskoe obrazovanie, Tome 90 (2019) no. 2, pp. 7-19. http://geodesic.mathdoc.fr/item/MO_2019_90_2_a1/