@article{MO_2011_a3,
     author = {E. V. Geras'kina and V. V. Tsukerman},
     title = {Lagrange {Theorem} is a {Powerful} {Tool} of {Functions} {Investigation}},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {24--33},
     publisher = {mathdoc},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2011_a3/}
}