Wassie Haile, Thongchai Mala, Yongyuth Osotsapar and Visoot Verasan (2006) “Screening of Ethiopian Traditional Medicinal Herbs for their Nitrification Inhibiting Ability”, Agriculture and Natural Resources. Bangkok, Thailand, 40(1), pp. 74–82. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/243507 (accessed: 14 April 2025).