Calcium soap from palm fatty acid distillate for ruminant feed: Calcium oxide particles sizeLienda Handojo, Antonius Indarto, Dian Shofinita, Muhammad Saadi, Dea Yulistia and Fathinah HasyyatiMATEC Web Conf., 268 (2019) 03001DOI: https://doi.org/10.1051/matecconf/201926803001