γ Cas stars: Normal Be stars with discs impacted by the wind of a helium-star companion?N. Langer, D. Baade, J. Bodensteiner, J. Greiner, Th. Rivinius, Ch. Martayan and C. C. BorreA&A, 633 (2020) A40DOI: https://doi.org/10.1051/0004-6361/201936736
