M. Ravikumar, J. Venkatesha, K. S. Niranjana, and B. R. Gurumurthy, “Effect of Integrated Nutrient Management on Tuber Yield and Quality and Nutrient Uptake in Coleus forskohlii Briq”., J. Root Crops, vol. 38, no. 2, p. 142, Jul. 2013.