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@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/} }
D. V. Lytkina. On $2$-groups, all of whose finite subgroups are of nilpotency class~$2$. Sibirskie èlektronnye matematičeskie izvestiâ, Tome 8 (2011), pp. 1-3. http://geodesic.mathdoc.fr/item/SEMR_2011_8_a0/