McIntosh, C; Demuth, H; Pospisilik, J; Pederson, R. Dipeptidyl peptidase IV inhibitors: How do they work as new antidiabetic agents?. Regulatory Peptides. 2005, 128 (2): 159–65. PMID 15780435. doi:10.1016/j.regpep.2004.06.001.
McIntosh, C; Demuth, H; Pospisilik, J; Pederson, R. Dipeptidyl peptidase IV inhibitors: How do they work as new antidiabetic agents?. Regulatory Peptides. 2005, 128 (2): 159–65. PMID 15780435. doi:10.1016/j.regpep.2004.06.001.