Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1979_249_3_a9, author = {V. P. Soltan and P. S. Soltan}, title = {$d$-convex functions}, journal = {Doklady Akademii Nauk}, pages = {555--558}, publisher = {mathdoc}, volume = {249}, number = {3}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1979_249_3_a9/} }
V. P. Soltan; P. S. Soltan. $d$-convex functions. Doklady Akademii Nauk, Tome 249 (1979) no. 3, pp. 555-558. http://geodesic.mathdoc.fr/item/DAN_1979_249_3_a9/