Improving waste cooking oil quality for biodiesel production with the ethanolic by‐product of soybean oil extraction - Bueno‐Borges, Larissa Braga; Santos, Grasiela Cristina Pereira dos; Alencar, Severino Matias; Regitano‐d'Arce, Marisa Aparecida Bismara (Journal of the American Oil Chemists' Society, 2019)