Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1968_3_3_a12, author = {E. K. Godunova and V. I. Levin}, title = {A~general class of inequalities containing {Steffensen's} inequality}, journal = {Matemati\v{c}eskie zametki}, pages = {339--344}, publisher = {mathdoc}, volume = {3}, number = {3}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1968_3_3_a12/} }
E. K. Godunova; V. I. Levin. A~general class of inequalities containing Steffensen's inequality. Matematičeskie zametki, Tome 3 (1968) no. 3, pp. 339-344. http://geodesic.mathdoc.fr/item/MZM_1968_3_3_a12/