Bona fide, strong-variable galactic luminous blue variable stars are fast rotators: detection of a high rotational velocity in HR Carinae - Groh, J.H; Barbá, R; Damineli Neto, Augusto; Hillier, D.J; Fernández-Lajús; Gamen, R. C; Moisés, A. P; Solivella, G; Teodoro, M (The Astrophysical Journal, 2009)