@article{MZM_1967_2_2_a12,
     author = {E. K. Godunova and V. I. Levin},
     title = {An inequality of {Maroni}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {221--224},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1967_2_2_a12/}
}