Perez, Y., Gonzalez, A., Castillo, J., Sanchez, A., Oliveira, P. e Pichara, C. 2019. Obtaining and characterization of pellets based on walnut shells, waste paper and paperboard. Revista Técnica da Faculdade de Engenharia da de Zulia. 42, 3 (Dez. 2019), 181-186.