Rivkin, A. S.; Davies, J. K.; Johnson, J. R.; Ellison, S. L.; Trilling, D. E.; Brown, R. H.; Lebofsky, L. A. (Eylül 2003), "Hydrogen concentrations on C-class asteroids derived from remote sensing", Meteoritics & Planetary Science, 38 (9), ss. 1383-1398, Bibcode:2003M&PS...38.1383R, doi:10.1111/j.1945-5100.2003.tb00321.x.
Rivkin, A. S.; Davies, J. K.; Johnson, J. R.; Ellison, S. L.; Trilling, D. E.; Brown, R. H.; Lebofsky, L. A. (Eylül 2003), "Hydrogen concentrations on C-class asteroids derived from remote sensing", Meteoritics & Planetary Science, 38 (9), ss. 1383-1398, Bibcode:2003M&PS...38.1383R, doi:10.1111/j.1945-5100.2003.tb00321.x.