Permatasari F, Hanim C and Kurniawati A 2024 The additional effect of cinnamon leaf powder (Cinnamomum burmanni Ness ex. BI) as a source of cinnamaldehyde on in vitro gas and methane production. Livestock Research for Rural Development. Volume 36, Article #72. Retrieved , from http://www.lrrd.org/lrrd36/6/3672ccha.html