Krzeminski, W. and Serkowski, K. (August, 1977). “Extremely high circular polarization of AN Ursae Majoris”. The Astrophysical Journal Letters216: L45. Bibcode: 1977ApJ...216L..45K. doi:10.1086/182506.
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Krzeminski, W. and Serkowski, K. (August, 1977). “Extremely high circular polarization of AN Ursae Majoris”. The Astrophysical Journal Letters216: L45. Bibcode: 1977ApJ...216L..45K. doi:10.1086/182506.