Porter, John M.; Rivinius, Thomas «Classical Be Stars». Publications of the Astronomical Society of the Pacific, 115, 812, 2003, pàg. 1153. Bibcode: 2003PASP..115.1153P. DOI: 10.1086/378307.
Porter, John M.; Rivinius, Thomas «Classical Be Stars». Publications of the Astronomical Society of the Pacific, 115, 812, 2003, pàg. 1153. Bibcode: 2003PASP..115.1153P. DOI: 10.1086/378307.