%0 Journal Article %A V. D. Galkin %A O. V. Pochinka %A D. D. Shubin %T Classification of nonsingular four-dimensional flows with a untwisted saddle orbit %J Sbornik. Mathematics %D 2024 %P 1499-1522 %V 215 %N 11 %U http://geodesic.mathdoc.fr/item/SM_2024_215_11_a2/ %G en %F SM_2024_215_11_a2