E. Tawo, A. Abara, S. Malu, and N. Alobi, “Evaluation of pH Levels in Some Common Carbohydrate Food Items Consumed by Communities in the Central Senatorial District of Cross River State, South-South of Nigeria”, Pak. J. Nutr., vol. 8, no. 9, pp. 1387–1390, Aug. 2009, doi: 10.3923/pjn.2009.1387.1390.