1. O. Bonnardel, P. Marcellin, Aluminium Pechiney, Alumina feeding regulation process. FR 2 749 858 patent, French priority 07712, dated 1996, June-17.
2. P. Homsi, O. Granacher, B. Sulmont, Aluminium Pechiney, Bath temperature and level measurement device and process. FR 2 727 985 patent, French priority 15086, dated 1994, December-09.
3. O. P. Bonnardel and P. Homsi, “The Pechiney Semi-Continuous and Automatic Measurement Device (CMD), A New Tool for Automatic Measurements”, Light Metals1999. pp. 303–309.
4. P. Homsi, O. Bonnardel, Aluminium Pechiney, Bath temperature regulation process. FR 2 753 727 patent, French priority 11962, dated 1996, September-25.