Effect of seed addition on SnO2-Based Varistors for low voltage application - Cilense, Mario; Ramirez, Miguel Angel; Foschini, Cesar Renato; Leite, Daniela Russo; Simões, Alexandre Zirpoli; Bassi, Welson; Longo, Elson; Varela, José Arana (Journal of the American Ceramic Society, 2013)