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Fossati, L.; et al. (February 2015). "B fields in OB stars (BOB): on the detection of weak magnetic fields in the two early B-type stars β CMa and ɛ CMa. Possible lack of a "magnetic desert" in massive stars". Astronomy and Astrophysics. 574: A20. arXiv:1411.6490. Bibcode:2015A&A...574A..20F. doi:10.1051/0004-6361/201424986. ISSN0004-6361.