1. American Conference of Governmental Industrial Hygienists (2006) Threshold limit values for chemical substances and physical agents: biological exposure indices. ACGIH, Cincinnati
2. American Conference of Governmental Industrial Hygienists (2004) Documentation of the threshold limit values and biological exposure indices: chromium(VI) water-soluble fume, recommended BEI. ACGIH, Cincinnati
3. Apostoli P, Maranelli G, Duca PG, Bavazzano P, Bortoli A, Cruciatti A, Elia G, Minoia C, Piccinini R, Sabbioni E, Sciarra G, Soave C (1997) Reference values of urinary chromium in Italy. Int Arch Occup Environ Health 70:173–179
4. Ashley K, Howe AM, Demange M, Nygren O (2003) Sampling and analysis considerations for the determination of hexavalent chromium in workplace air. J Environ Monit 5:707–716
5. Baruthio F (1995) Détermination du chrome, in Techniques d’analyse des oligo-éléments chez l’homme, Lavoisier ed, Paris ISBN 2. 7430–0019–8. 51–59