Mambu, S. M. “Pendugaan Emisi Metana Pada Sistem Pengelolaan Tanaman Padi Di Kabupaten Minahasa (The Estimation of Methane Emission in The Rice Management System in Minahasa Rregency)”. JURNAL BIOS LOGOS, vol. 2, no. 1, Feb. 2012, doi:10.35799/jbl.2.1.2012.378.