K. L. Hossain, M. A. Wadud, M. A. Kashem, E. Santosa, and M. S. Ali, “Effect of Different Nitrogen and Potassium Rates on Agronomic Characters of Aloe indica”, J. Agron. Indonesia (Indonesian J. Agron.), vol. 35, no. 1, Apr. 2007, doi: 10.24831/jai.v35i1.1311.