On the c_0-extension property, 48th Winter School in Abstract Analysis--Section Analysis, Svratka, Czech Republic, January 2020.

Additional set-theoretic assumptions and twisted sums of Banach spaces, 1st Workshop "Studies in Mathematical Logic”, IME-USP, São Paulo, Brazil, December 2019.

A propriedade da c_0-extensão, XIII ENAMA-Encontro Nacional de Análise Matemática e Aplicações, UFSC, Florianópolis, Brazil, November 2019.

Twisted sums for scattered spaces, 47th Winter School in Abstract Analysis--Section Analysis, Svratka, Czech Republic, January 2019.

Twisted sums of c_0 and C(K), Geometrical Aspects of Banach spaces, University of Birmingham, England, June 2018.