Jerlov N. G. (1976). Marine Optics. Elsevie Oceanography Series. Vol.14. Amsterdam: Elsevier Scientific Publishing Company. pp.128–129. ISBN0-444-41490-8. Archived from the original on December 21, 2017. Retrieved August 1, 2012.
Jerlov N. G. (1976). Marine Optics. Elsevie Oceanography Series. Vol.14. Amsterdam: Elsevier Scientific Publishing Company. pp.128–129. ISBN0-444-41490-8. Archived from the original on December 21, 2017. Retrieved August 1, 2012.