«The First Telescopes» [Архівовано 9 квітня 2008 у Wayback Machine.], Cosmic Journey: A History of Scientific Cosmology (Center for History of Physics, a Division of the American Institute of Physics)
«Bakich sample pages Chapter 2» [Архівовано 10 вересня 2008 у Wayback Machine.] (PDF). p. 3. Retrieved 2013-08-01. «John Donavan Strong, a young physicist at the California Institute of Technology, was one of the first to coat a mirror with aluminum. He did it by thermal vacuum evaporation. The first mirror he aluminized, in 1932, is the earliest known example of a telescope mirror coated by this technique.»
«Bakich sample pages Chapter 2» [Архівовано 10 вересня 2008 у Wayback Machine.] (PDF). p. 3. Retrieved 2013-08-01. «John Donavan Strong, a young physicist at the California Institute of Technology, was one of the first to coat a mirror with aluminum. He did it by thermal vacuum evaporation. The first mirror he aluminized, in 1932, is the earliest known example of a telescope mirror coated by this technique.»
«The First Telescopes» [Архівовано 9 квітня 2008 у Wayback Machine.], Cosmic Journey: A History of Scientific Cosmology (Center for History of Physics, a Division of the American Institute of Physics)
