Upender Kumar, Dr. Pardeep Gupta. “Composite Approach of RSM-ABO for Optimization of Production of Ricinus Communis Biodiesel Using Lithium Doped CaO Nanocatalyst”. International Journal of Advanced Science and Technology, Vol. 29, no. 05, May 2020, pp. 5555 -70, http://sersc.org/journals/index.php/IJAST/article/view/15029.