Mahdavi, R.; Nikniaz, Z.; Rafraf, M.; Jouyban, A. Determination and Comparison of Total Polyphenol and Vitamin C Contents of Natural Fresh and Commercial Fruit Juices. Pak. J. Nutr. 2010, 9 (10), 968–972. https://doi.org/10.3923/pjn.2010.968.972.