1. Howlett HCS, Bailey CJ (2007) Galegine and antidiabetic plants. In: Bailey CJ, Campbell IW, Chan JCN, Davidson JA, Howlett HCS, Ritz P (eds) Metformin—the gold standard. Wiley, Chichester, pp 3–9
2. Muller H, Reinwein H (1927) Zur pharmakologie des Galegins. Arch Exp Pathol Pharmakol 125:212–228
3. Howlett HCS, Bailey CJ (2007) Discovery of metformin. In: Bailey CJ, Campbell IW, Chan JCN, Davidson JA, Howlett HCS, Ritz P (eds) Metformin—the gold standard. Wiley, Chichester, pp 11–16
4. Graham GG, Punt J, Arora M et al (2011) Clinical pharmacokinetics of metformin. Clin Pharmacokinet 50:81–98
5. Bailey CJ, Wilcock C, Scarpello JH (2008) Metformin and the intestine. Diabetologia 51:1552–1553