Georgi P. Tolstov (1962). Fourier Series. Englewood Cliffs, NJ: Prentice-Hall, Inc. с. 119.
books.google.com
Rayleigh, J.W.S. (1889) "On the character of the complete radiation at a given temperature," Philosophical Magazine, vol. 27, pages 460–469. Available on-line here [Архівовано 7 квітня 2019 у Wayback Machine.].
web.archive.org
Rayleigh, J.W.S. (1889) "On the character of the complete radiation at a given temperature," Philosophical Magazine, vol. 27, pages 460–469. Available on-line here [Архівовано 7 квітня 2019 у Wayback Machine.].
