Effect of two types of propolis on methane production and rumen fermentation in vitro - Morsy, Amr S; Soltan, Yosra A; Godoy, Patrícia Barbosa de; Berenchtein, Bernardo; Lucas, Ronaldo C; Greiling, Alexander M; Sallam, Sobhy Mohamed Abdallah; Alencar, Severino Matias de; Abdalla, Adibe Luiz (Congresso Latino Americano de Nutrição Animal - IV CLANA, 2010)