Effects of Andrographis paniculata on the extent and rate of in vitro gas and methane production - Yusuf, Aisha Laraba; Goh, Yong Meng; Samsudin, Anjas Asmara @ Ab Hadi; Idris, A. B.; Alimon, Abdul Razak; Sazili, Awis Qurni (Malaysian Society of Animal Production, 2012)