Null paths on a toroidal topological black hole in conformal Weyl gravity J. R. Villanueva, Francisco Tapia, Martín Molina and Marco Olivares Eur. Phys. J. C, 78 10 (2018) 853 Published online: 23 October 2018 DOI: 10.1140/epjc/s10052-018-6328-5