S. Upadhyaya and L. R. Saikia, “Agronomic Requirements for Organic Cultivation of <I>Andrographis Paniculata</I> (Burm) Nees. In the Upper Brahmaputra Valley Agroclimatic Zone of India”, Indian Forester, vol. 141, no. 2, pp. 167–172, Feb. 2015.