1. Solar Radiation and its Transmission through Air and Water
2. BEARMAN, G. (Ed.), 1995 Seawater its Composition, Properties and Behaviour. 2nd edition The Open University, Milton Keynes. Pp 168.
3. BOGUSLAWSKI, G.von,1884 Handbuch der Ozeanographie, Band I. 1st ed. Stuttgart. Pp 400.
4. CIALDI, M. and SECCHI, P.A., 1865 Sur la transparance de la mer. Compte Rendu des Seances de l'Academie des Sciences, 17 July: 100-104.
5. FOREL, F.A. 1901 Handbuch der Seenkunde, Allgemeine Limnologie. Stuttgart. Pp 249.