@article{VTGU_2009_1_a3,
     author = {E. A. Fomina},
     title = {A~criterion of an infinitely narrow field},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {27--30},
     publisher = {mathdoc},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2009_1_a3/}
}