Spin-induced scalarization of Kerr black holes with a massive scalar field Daniela D. Doneva, Lucas G. Collodel, Christian J. Krüger and Stoytcho S. Yazadjiev Eur. Phys. J. C, 80 12 (2020) 1205 Published online: 29 December 2020 DOI: 10.1140/epjc/s10052-020-08765-3