Anisotropic 2+1 dimensional black holes by gravitational decoupling Ángel Rincón, Ernesto Contreras, Francisco Tello-Ortiz, Pedro Bargueño and Gabriel Abellán Eur. Phys. J. C, 80 6 (2020) 490 Published online: 01 June 2020 DOI: 10.1140/epjc/s10052-020-8071-y