“Application of High-Performance Thin Layer Chromatography and Near Infrared Spectroscopy in the Validation of in-Use Stability of Herbal Medicines Used in the Management of Covid-19”. The East and Central African Journal of Pharmaceutical Sciences, vol. 25, no. 1, Apr. 2023, pp. 31-40, http://jsep.uonbi.ac.ke/ojs/index.php/ecajps/article/view/1483.