“Influence of External Nitrogen on Nitrogenase Enzyme Activity and Auxin Production in Herbaspirillum Seropedicae (Z78)”. Tropical Life Sciences Research 26, no. 1 (July 31, 2015): 101–110. Accessed May 13, 2024. https://ejournal.usm.my/tlsr/article/view/tlsr_vol26-no-1-2015_9.