Detpiratmongkol, S., and Liphan, S. “Effects of different harvesting times on growth, yield and quality of Kalmegh (Andrographis paniculata Wall Ex. Nees)”. International Journal of Agricultural Technology, vol. 14, no. 7, Dec. 2018, pp. 1161-70, https://li04.tci-thaijo.org/index.php/IJAT/article/view/8482.