Lucas, Philip W.; Tinney; Burningham; Leggett; Pinfield; Smart; et al. (2010). ”Discovery of a very cool brown dwarf amongst the ten nearest stars to the Solar System”. 'arXiv:1004.0317v1 [astro-ph.SR]'.
Weaver, Harold F. (8 juni 1947). ”The Visibility of Stars Without Optical Aid”. Publications of the Astronomical Society of the Pacific "59" (350): ss. 232–243. doi:10.1086/125956. Bibcode: 1947PASP...59..232W.
Weaver, Harold F. (8 juni 1947). ”The Visibility of Stars Without Optical Aid”. Publications of the Astronomical Society of the Pacific "59" (350): ss. 232–243. doi:10.1086/125956. Bibcode: 1947PASP...59..232W.