Janani, T, et al. “Response of Butter Beans (Phaseolus Lunatus L.) for Different Combinations of Nitrogen and Phosphorus on Growth, Yield and Quality Characters”. Journal of Agriculture and Ecology, vol. 8, no. 8, Aug. 2019, pp. 52-58, https://saaer.org.in/journals/index.php/jae/article/view/226.