@article{MO_2015_1_a5,
     author = {K. Lesan},
     title = {What is vector?},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {56--59},
     year = {2015},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2015_1_a5/}
}