@article{DAN_1991_320_4_a6,
     author = {V. V. Kurta},
     title = {Some qualitative properties of solutions of an equation of mean},
     journal = {Doklady Akademii Nauk},
     pages = {804--807},
     publisher = {mathdoc},
     volume = {320},
     number = {4},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_320_4_a6/}
}