Pertiwi, Mira Ndaru, Muhammad Ainsyar Harahap, and Joelal Achmadi. 2025. “Effects of Indigofera Zollingeriana and Ammonium Sulfate-ca(oh)₂ As Protein and Non-Protein Nitrogen Supplement on in Vitro Ruminal Fermentation ”. Journal of Advanced Veterinary Research 15 (5):595-99. https://www.advetresearch.com/index.php/AVR/article/view/2339.