Cite
FINITE INDEX SUBGROUPS OF FULLY RESIDUALLY FREE GROUPS.
MLA
Nikolaev, Andrey V., et al. “Finite Index Subgroups of Fully Residually Free Groups.” International Journal of Algebra & Computation, vol. 21, no. 4, June 2011, pp. 651–73. EBSCOhost, https://doi.org/10.1142/S0218196711006388.
APA
Nikolaev, A. V., Serbin, D. E., & Kharlampovich, O. (2011). Finite Index Subgroups of Fully Residually Free Groups. International Journal of Algebra & Computation, 21(4), 651–673. https://doi.org/10.1142/S0218196711006388
Chicago
Nikolaev, Andrey V., Denis E. Serbin, and O. Kharlampovich. 2011. “Finite Index Subgroups of Fully Residually Free Groups.” International Journal of Algebra & Computation 21 (4): 651–73. doi:10.1142/S0218196711006388.