Remarks on the black hole shadows in Kerr-de Sitter space times Eunice Omwoyo, Humberto Belich, Júlio C. Fabris and Hermano Velten Eur. Phys. J. C, 82 5 (2022) 395 Published online: 03 May 2022 DOI: 10.1140/epjc/s10052-022-10361-6