Blaauw, A.; Hiltner, W. A.; Johnson, H. L. (1959). ”Photoelectric Photometry of the Association III Cephei.”. The Astrophysical Journal 130: sid. 69. doi:10.1086/146697. ISSN0004-637X.
Crawford, D. L.; Barnes, J. V. (1970). ”Four-color and H-beta photometry of open clusters - VI - the association III Cep.”. The Astronomical Journal 75: sid. 952. doi:10.1086/111045. ISSN0004-6256.
Blaauw, A.; Hiltner, W. A.; Johnson, H. L. (1959). ”Photoelectric Photometry of the Association III Cephei.”. The Astrophysical Journal 130: sid. 69. doi:10.1086/146697. ISSN0004-637X.
Crawford, D. L.; Barnes, J. V. (1970). ”Four-color and H-beta photometry of open clusters - VI - the association III Cep.”. The Astronomical Journal 75: sid. 952. doi:10.1086/111045. ISSN0004-6256.