Addition of increasing doses of ricinoleic acid from castor oil (Ricinus communis L.) in horse diets: intake, digestibility, glucose and insulin dynamic - Gandra, Jefferson Rodrigues; Gil, Paulo César Nunes; Gandra, Érika Rosendo de Sena; Takiya, Caio Seiti; Gobesso, Alexandre Augusto de Oliveira (Journal of Applied Animal Research, 2017)