A. S. Plapito, A. Aisyah, and P. Asnur, “Testing the Effectiveness of Azotobacter Bacteria and Organic Materials on the Growth, Production, Assembly of Plant N and Soil N Availability in Kailan Plants (Brassica Oleraceae)”, G.Agr.Sci.J, vol. 7, no. 1, pp. 57–89, May 2021.