Frerichs, Rudolf (1953). "New Optical Glasses with Good Transparency in the Infrared". Journal of the Optical Society of America. 43 (12): 1153–1157. Bibcode:1953JOSA...43.1153F. doi:10.1364/JOSA.43.001153.
Ehrenberg, Werner; Siday, Raymond E. (1949). "The refractive index in electron optics and the principles of dynamics". Proceedings of the Physical Society. Section B. 62 (1): 8. Bibcode:1949PPSB...62....8E. doi:10.1088/0370-1301/62/1/303.
Einstein, A. (1967). "On a heuristic viewpoint concerning the production and transformation of light". In Ter Haar, D. (ed.). The Old Quantum Theory. Pergamon. pp.91–107. OCLC534625. The chapter is an English translation of Einstein's 1905 paper on the photoelectric effect.
Frerichs, Rudolf (1953). "New Optical Glasses with Good Transparency in the Infrared". Journal of the Optical Society of America. 43 (12): 1153–1157. Bibcode:1953JOSA...43.1153F. doi:10.1364/JOSA.43.001153.
Merritt, Ernest (1932). "The Optics of Radio-Transmission". Journal of the Optical Society of America. 21 (2): 90–100. doi:10.1364/JOSA.21.000090.
Spiller, E. (2015). "X-Rays: Optical Elements". In Hoffman, Craig; Driggers, Ronald (eds.). Encyclopedia of Optical Engineering (2nded.). Taylor & Francis. doi:10.1081/E-EOE2. ISBN978-1-351-24718-4.
Ehrenberg, Werner; Siday, Raymond E. (1949). "The refractive index in electron optics and the principles of dynamics". Proceedings of the Physical Society. Section B. 62 (1): 8. Bibcode:1949PPSB...62....8E. doi:10.1088/0370-1301/62/1/303.
For a solid approach to the complexity of Planck's intellectual motivations for the quantum, for his reluctant acceptance of its implications, see H. Kragh, Max Planck: the reluctant revolutionaryArchived 2012-04-01 at the Wayback Machine, Physics World. December 2000.
For a solid approach to the complexity of Planck's intellectual motivations for the quantum, for his reluctant acceptance of its implications, see H. Kragh, Max Planck: the reluctant revolutionaryArchived 2012-04-01 at the Wayback Machine, Physics World. December 2000.
Hogendijk, Jan P.; Sabra, Abdelhamid I., eds. (2003). The Enterprise of Science in Islam: New Perspectives. MIT Press. pp.85–118. ISBN978-0-262-19482-2. OCLC50252039.
Einstein, A. (1967). "On a heuristic viewpoint concerning the production and transformation of light". In Ter Haar, D. (ed.). The Old Quantum Theory. Pergamon. pp.91–107. OCLC534625. The chapter is an English translation of Einstein's 1905 paper on the photoelectric effect.