G. P. Egorychev, Yu. D. Ushakov, “The ranks of the $p$-central series of free groups of certain manifolds”, Mat. Zametki, 22:4 (1977), 575–582; Math. Notes, 22:4 (1977), 811–815
1973
2.
Yu. D. Ushakov, “The free group of the commutator of two nilpotent varieties”, Sibirsk. Mat. Zh., 14:3 (1973), 636–650; Siberian Math. J., 14:3 (1973), 442–452
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