@article{FPM_2008_14_5_a6,
     author = {I. P. Kramarev and L. V. Lokutsievskiy},
     title = {Homotopy types of group lattices},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {103--123},
     publisher = {mathdoc},
     volume = {14},
     number = {5},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2008_14_5_a6/}
}