Javed S. Shaikh, and Nutan N. Rao. “Troubleshooting and Maintenance of High-Performance Liquid Chromatography- A Review”. World Journal of Pharmaceutical Sciences, vol. 5, no. 12, Dec. 2017, pp. 162-9, https://wjpsonline.com/index.php/wjps/article/view/troubleshooting-maintenance-hplc-review.