Kurniawati, Asih, et al. “ADDITION OF ESSENTIAL OIL SOURCE, Amomum Compactum Soland Ex Maton AND ITS EFFECT ON RUMINAL FEED FERMENTATION IN-VITRO”. BIOTROPIA, vol. 26, no. 3, Dec. 2019, pp. 172-80, doi:10.11598/btb.2019.26.3.1089.