Sequential hydrolysis of bovine caseins in the preparation of a low-phenylalanine fraction for the treatment of phenylketonuria E. Perrin, L. Miclo, A. Driou, JL Gaillard and G. Linden Reprod. Nutr. Dev., 36 4 (1996) 414-415 DOI: 10.1051/rnd:19960416