Crawford, D. L.; Barnes, J. V.; Golson, J. C. (1971). “Four-color, H-beta, and UBV photometry for bright B-type stars in the northern hemisphere”. 《The Astronomical Journal》 76: 1058. Bibcode:1971AJ.....76.1058C. doi:10.1086/111220.
Abt, H. A; Levato, H (1977). “Spectral types in the Orion OB1 association”. 《Publications of the Astronomical Society of the Pacific》 89: 797. Bibcode:1977PASP...89..797A. doi:10.1086/130230.
Warren, W. H., Jr; Hesser, J. E (1978). “A photometric study of the Orion OB 1 association. III - Subgroup analyses”. 《The Astrophysical Journal Supplement Series》 36: 497. Bibcode:1978ApJS...36..497W. doi:10.1086/190510.
Crawford, D. L.; Barnes, J. V.; Golson, J. C. (1971). “Four-color, H-beta, and UBV photometry for bright B-type stars in the northern hemisphere”. 《The Astronomical Journal》 76: 1058. Bibcode:1971AJ.....76.1058C. doi:10.1086/111220.
Balega, I. I; Balega, Yu. Yu; Hofmann, K. -H; Tokovinin, A. A; Weigelt, G. P (1999). “Parameters of four multiple systems from speckle interferometry”. 《Astronomy Letters》 25 (12): 797. Bibcode:1999AstL...25..797B.
Evans, D. S. (June 20–24, 1966). Batten, Alan Henry; Heard, John Frederick (편집). “The Revision of the General Catalogue of Radial Velocities”. 《Determination of Radial Velocities and Their Applications, Proceedings from IAU Symposium No. 30》 30: 57. Bibcode:1967IAUS...30...57E.
Abt, H. A; Levato, H (1977). “Spectral types in the Orion OB1 association”. 《Publications of the Astronomical Society of the Pacific》 89: 797. Bibcode:1977PASP...89..797A. doi:10.1086/130230.
Warren, W. H., Jr; Hesser, J. E (1978). “A photometric study of the Orion OB 1 association. III - Subgroup analyses”. 《The Astrophysical Journal Supplement Series》 36: 497. Bibcode:1978ApJS...36..497W. doi:10.1086/190510.