"Physics for Scientists & Engineers" Serway Raymond A., 1990., Saunders, [1]
"Report of the Board of Regents By Smithsonian Institution", Smithsonian Institution. [3]
Fromhold A.T.: "Quantum mechanics for applied physics and engineering", Courier Dover Publications, 1991., [5]
free.fr
histv2.free.fr
[2]Arhivirano 2009-10-04 na Wayback Machine-u Smith, W., (1873) "Effect of Light on Selenium during the passage of an Electric Current", Nature, 1873-02-20, str.303.
nasa.gov
ntrs.nasa.gov
Willis E. Lamb, Willis Lamb, Scully Marlan O.: "The photoelectric effect without photons" [4] 1968.
web.archive.org
[2]Arhivirano 2009-10-04 na Wayback Machine-u Smith, W., (1873) "Effect of Light on Selenium during the passage of an Electric Current", Nature, 1873-02-20, str.303.