@article{MO_2017_4_a4,
     author = {S. I. Kalinin},
     title = {Ki {Fan} inequality could be discovered much formerly},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {25--27},
     year = {2017},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2017_4_a4/}
}