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[2009-10] Silva PV. Fixed points of endomorphisms over special confluent rewriting systems .

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[2012-10] Silva PV. Fixed points of endomorphisms of virtually free groups .

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Rodaro E, Silva PV. Fixed points of Endomorphisms of Graph Groups. Journal of Group Theory. 2013;16(4):573-583.

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[2010-15] Silva PV. Fixed points of endomorphisms of certain free products .

Silva PV. Fixed points of endomorphisms of certain free products. RAIRO Theor. Inform. Appl.. 2012;46:165-179.

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[2014-5] Araújo V, Silva PV, Sykiotis M. Finiteness results for subgroups of finite extensions .Edit

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[2008-23] Silva PV, Weil P. On finite-index extensions of subgroups of free groups .Edit