Campbell, W.W.; Trumpler, R. (1923). “Search for Intramercurial Objects”. Publications of the Astronomical Society of the Pacific35 (206): 214. Bibcode: 1923PASP...35..214C. doi:10.1086/123310.
Drobyshevskii, E. M. (1992). “Impact Avalanche Ejection of Silicates from Mercury and the Evolution of the Mercury / Venus System”. Soviet Astr36 (4): 436–443. Bibcode: 1992SvA....36..436D.
Campbell, W.W.; Trumpler, R. (1923). “Search for Intramercurial Objects”. Publications of the Astronomical Society of the Pacific35 (206): 214. Bibcode: 1923PASP...35..214C. doi:10.1086/123310.
Campins, H.; Davis, D. R.; Weidenschilling, S. J.; Magee, M. (1996). “Searching for Vulcanoids”. Completing the Inventory of the Solar System, Astronomical Society of the Pacific Conference Proceedings107: 85–96. Bibcode: 1996ASPC..107...85C.