Tufenkci, S, et al. “Effect of Phosphorus and Nitrogen Application and Rhizobium Inoculation on Yield and Nutrient Uptake in Sainfoin (Onobrychis Sativa)”. The Indian Journal of Agricultural Sciences, vol. 75, no. 5, May 2005, https://epubs.icar.org.in/index.php/IJAgS/article/view/9349.