For citations:

Durnev V.G., Zetkina O.V., Zetkina A.I. ON THE TITTS’ ALTERNATIVE FOR SUBGROUPS OF F-GROUPS. Chebyshevskii Sbornik. 2014;15(1):110-120. (In Russ.) https://doi.org/10.22405/2226-8383-2014-15-1-110-120