1. ATSDR (Agency of Toxic Substances & Disease Registry), Public Health Statement for Al (2008), from: .
2. ATSDR (Agency of Toxic Substances & Disease Registry), Public Health Statement for Ba (2007), from: .
3. ATSDR (Agency of Toxic Substances & Disease Registry), Public Health Statement for Mn (2000a), from: .
4. ATSDR (Agency of Toxic Substances & Disease Registry), Public Health Statement for Ni (2005), from: .
5. ATSDR (Agency of Toxic Substances & Disease Registry), Public Health Statement for Sr (2004), from: .