Voir la notice de l'article provenant de la source Math-Net.Ru
@article{KUIPM_1977_a1, author = {Ya. I. Zabotin}, title = {A class of quasiconcave functionals and the optimal redundancy problem}, journal = {Issledovaniya po Prikladnoi Matematike i Informatike}, pages = {11--14}, publisher = {mathdoc}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KUIPM_1977_a1/} }
Ya. I. Zabotin. A class of quasiconcave functionals and the optimal redundancy problem. Issledovaniya po Prikladnoi Matematike i Informatike, Issledovaniya po Prikladnoi Matematike (1977), pp. 11-14. http://geodesic.mathdoc.fr/item/KUIPM_1977_a1/