Roman, Nancy G. (August 19, 1980). "Nancy G. Roman". www.aip.org (Interview). Interviewed by David DeVorkin. College Park, MD USA: Niels Bohr Library & Archives, American Institute of Physics.
Lubin, Jack; Robertson, Paul; Stefansson, Gudmundur; Ninan, Joe; Mahadevan, Suvrath; Endl, Michael; Ford, Eric; Wright, Jason T.; Beard, Corey; Bender, Chad; Cochran, William D.; Diddams, Scott A.; Fredrick, Connor; Halverson, Samuel; Kanodia, Shubham; Metcalf, Andrew J.; Ramsey, Lawrence; Roy, Arpita; Schwab, Christian; Terrien, Ryan (2021), Stellar Activity Manifesting at a One Year Alias Explains Barnard b as a False Positive, arXiv:2105.07005
Lippincott, Sarah Lee (December 1995). "Obituary: Peter van de Kamp, 1901–1995". Bulletin of the American Astronomical Society. 27 (4): 1483–1484. Bibcode:1995BAAS...27.1483L.