ANJANEYULU, K, and H B RAGHUPATHI. 2010. “Multivariate Diagnosis of Nutrient Imbalance in Rose Grown under Open and Protected Conditions Using Compositional Nutrient Diagnosis and Principal Component Analysis”. The Indian Journal of Agricultural Sciences 80 (12). https://epubs.icar.org.in/index.php/IJAgS/article/view/2115.