@article{VTGU_2010_1_a0,
     author = {S. Ya. Grinshpon and M. M. Nikol'skaya (Savinkova)},
     title = {$IF$-groups},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {5--14},
     year = {2010},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2010_1_a0/}
}