WIMT in Gullstränd–Painlevé and Reissner–Nordström metrics: induced stable gravito-magnetic monopoles Jesús Martín Romero and Mauricio Bellini Eur. Phys. J. C, 75 5 (2015) 201 Published online: 08 May 2015 DOI: 10.1140/epjc/s10052-015-3413-x