@article{DAN_1991_317_3_a11,
     author = {V. G. Pestov},
     title = {Nonstandard hulls of normed {Grassmann} algebras and their},
     journal = {Doklady Akademii Nauk},
     pages = {565--569},
     publisher = {mathdoc},
     volume = {317},
     number = {3},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_317_3_a11/}
}