Title : Pharmacokinetics and pharmacodynamics of single rising intravenous doses (0.5 mg-10 mg) and determination of absolute bioavailability of the dipeptidyl peptidase-4 inhibitor linagliptin (BI 1356) in healthy male subjects - Retlich_2010_Clin.Pharmacokinet_49_829
Title : Binding to dipeptidyl peptidase-4 determines the disposition of linagliptin (BI 1356)--investigations in DPP-4 deficient and wildtype rats - Retlich_2009_Biopharm.Drug.Dispos_30_422