Ferreira, I. M. P. L. V., O. Pinho, M. V. Mota, P. Tavares, A. Pereira, M. P. Goncalves, D. Torres, C. Rocha, and J. A. Teixeira. "Preparation of ingredients containing an ACE-inhibitory peptide by tryptic hydrolysis of whey protein concentrates." International Dairy Journal. 17 (2007): 481-487.