van de Kamp, P.: Alternate dynamical analysis of Barnard's star. Astronomical Journal, 08/1969, 74. vsk, s. 757–759. doi:10.1086/110852. Bibcode 1969AJ.....74..757V. Viitattu 28.3.2013.
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articles.adsabs.harvard.edu
Fredrick, L. W.: Peter van de Kamp (1901-1995). Publications of the Astronomical Society of the Pacific, 1996, 108. vsk, s. 556–559. Artikkelin verkkoversio. Viitattu 28.3.2013. (englanniksi)
adsabs.harvard.edu
van de Kamp, P.: Alternate dynamical analysis of Barnard's star. Astronomical Journal, 08/1969, 74. vsk, s. 757–759. doi:10.1086/110852. Bibcode 1969AJ.....74..757V. Viitattu 28.3.2013.