McIntosh, C; Demuth, H; Pospisilik, J; Pederson, R (2005). “Dipeptidyl peptidase IV inhibitors: How do they work as new antidiabetic agents?”. Regulatory Peptides. 128 (2): 159–65. doi:10.1016/j.regpep.2004.06.001. PMID15780435.
McIntosh, C; Demuth, H; Pospisilik, J; Pederson, R (2005). “Dipeptidyl peptidase IV inhibitors: How do they work as new antidiabetic agents?”. Regulatory Peptides. 128 (2): 159–65. doi:10.1016/j.regpep.2004.06.001. PMID15780435.