2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/13720Several topics are discussed regarding the pseudo-Newtonian models of the gravitational field around rotating black holes9 pages, 2 figures; LaTeX2.09 (l-aa.sty, epsf.sty); Astronomy & Astrophysics, in pressAstrophysicstext