Gitik, Rita; Margolis, Stuart W.; Steinberg, Benjamin
On the Kurosh theorem and separability properties.
J. Pure Appl. Algebra 179, No.1-2, 87-97 (2003). [ISSN 0022-4049]
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Coulbois, Thierry
Free product, profinite topology and finitely generated subgroups.
Int. J. Algebra Comput. 11, No.2, 171-184 (2001). [ISSN 0218-1967]
[A]*
You, Shihong
The product separability of the generalized free product of cyclic groups.
J. Lond. Math. Soc., II. Ser. 56, No.1, 91-103 (1997). [ISSN 0024-6107]