Tan Tzy Yin, Ui Li Pin and Amir Hamzah Ahmad Ghazali (2015) “Influence of External Nitrogen on Nitrogenase Enzyme Activity and Auxin Production in Herbaspirillum seropedicae (Z78)”, Tropical Life Sciences Research, 26(1), pp. 101–110. Available at: https://ejournal.usm.my/tlsr/article/view/tlsr_vol26-no-1-2015_9 (Accessed: 20 April 2025).