Kanjilal, ; P.B., ; Bordoloi, ; S., ; Kalita, ; R., ; Barman, ; P., ; Singh, and R.S, (2001). Cultivation practices for Kalmegh (Andrographis paniculata) and Spiderling (Boerhhavia diffusa) in Assam, India.. in : Recent Progress in Medicinal Plants. Vol. V: 175-180., Govil, ; N.; Pandey, J.; J.; Shivakumar, ; G.; Singh, B.; K., V.; (Eds), Researchco Book Centre, New Delhi., Sci Tech Publishing LLC, Houston, USA, pp 175-180, ISBN:1930813104.