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Silva PV, Soler-Escrivà X, Ventura E. Finite automata for Schreier graphs of virtually free groups. J. Group Theory. 2016;19:25-54.Edit

Silva MC, Estrada MF. José Anastácio da Cunha e a Álgebra do seu tempo. CMUM ed. Portugal, Braga: Universidade do Minho. Centro de Matemática (CMAT) 2005.Edit

[2006-7] Silva PV, Weil P. On an algorithm to decide whether a free group is a free factor of another .Edit

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Simões Md, de Oliveira PM, Costa AP. Análise Probabilística do fluxo de tráfego num cruzamento semi-actuado 2002.Edit

Simões L., Oliveira PM. Modeling and Simulation of Traffic Movements at Semi-Actuated Signalized Intersections. Journal of Transportation Engineering. 2010;136:554-564.Edit

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Simões Md, de Oliveira PM, Costa AP. Análise de filas de espera com pausas do servidor para controle de tráfego 2005.Edit