Khamis, H., K. Lusweti, H. Mwevura, S. Nyanzi, and B. Kiremire. “Quantification of Lycopene from Tomatoes and Watermelons by Using Beer-Lambert Principle”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 38, no. 2, Dec. 2017, pp. 119-33, https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/3480.