@article{SEMR_2011_8_a0,
     author = {D. V. Lytkina},
     title = {On $2$-groups, all of whose finite subgroups are of nilpotency class~$2$},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {1--3},
     publisher = {mathdoc},
     volume = {8},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2011_8_a0/}
}