@article{MO_2008_48_4_a4,
     author = {H. Poincar\'e},
     title = {Mathematical {Definitions} and {Teaching}},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {50--59},
     publisher = {mathdoc},
     volume = {48},
     number = {4},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2008_48_4_a4/}
}