Dieu Phan, T. T. ., Bittová, M. ., Mikulášek, K. ., Kráčmar, S. ., Kubáň, V. ., Valášek, P. . and Svobodová, B. . (2015) “Content of 4(5)-methylimidazole, caffeine and chlorogenic acid in commercial coffee brands”, Potravinarstvo Slovak Journal of Food Sciences, 9(1), pp. 31–38. doi: 10.5219/422.