@article{MZM_1968_3_3_a11,
     author = {V. I. Berdyshev},
     title = {A~relation between {Jensen's} inequality and a~geometrical problem},
     journal = {Matemati\v{c}eskie zametki},
     pages = {327--338},
     publisher = {mathdoc},
     volume = {3},
     number = {3},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1968_3_3_a11/}
}