@article{VTGU_2009_2_a4,
     author = {G. G. Pestov and E. A. Fomina},
     title = {A~subfield~$B$ of elements which are infinitely near to the base},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {41--47},
     publisher = {mathdoc},
     number = {2},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2009_2_a4/}
}