Gravitational redshift/blueshift of light emitted by geodesic test particles, frame-dragging and pericentre-shift effects, in the Kerr–Newman–de Sitter and Kerr–Newman black hole geometries
Eur. Phys. J. C, 81 2 (2021) 147
Published online: 11 February 2021
DOI: 10.1140/epjc/s10052-021-08911-5