%0 Journal Article %A V. M. Tsvetkov %T A simple example of extensions without an integral basis %J Zapiski Nauchnykh Seminarov POMI %D 2000 %P 341-344 %V 272 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2000_272_a21/ %G ru %F ZNSL_2000_272_a21