Walter R, Simmons WH, Yoshimoto T (April 1980). "Proline specific endo- and exopeptidases". Molecular and Cellular Biochemistry. 30 (2): 111–27. doi:10.1007/bf00227927. PMID6991912.
Walter R, Simmons WH, Yoshimoto T (April 1980). "Proline specific endo- and exopeptidases". Molecular and Cellular Biochemistry. 30 (2): 111–27. doi:10.1007/bf00227927. PMID6991912.