Dwatmadji, Purnomoadi, A., Suteky, T. and Sipriyadi (2026) “Phytogenic feed additives for improving feed efficiency and lowering ruminants’ enteric methane emission on palm oil sludge feed: in vitro study ”, International Journal of Agricultural Technology, 22(4), pp. 1687–1702. doi: 10.63369/ijat.2026.22.4.1687-1702.