References
- Ide , C . November 2009 . Word of mouth . Safety and Health Practitioner , 27 ( 11 ) : 46 – 48 . (SHP, London)
- Slikkerveer , A and de Wolff , F A . 2006 . “ Toxicology of bismuth and its compounds ” . In Toxicology of Metals , Edited by: Chang , L W . 444 Boca Raton , FL : CRC Press . Chapter 27