A Novel Approach towards Green Extraction for Glycyrrhitinic Acid by Ionic Liquid Based Microwave Assisted Extraction and Optimization through Response Surface Methodology, Bhan, Meenu, Satija Saurabh, Garg Chanchal, Dureja Harish, and Garg Munish , Pharmacognosy Journal, September 2017, Volume 9, Issue 6, p.866-872, (2017)