Article written by Emilio Alfaro in the Magazine "Información y Actualidad Astronómica" of the Instituto de Astrofísica de Andalucía (IAA-CSIC), number 10, pages 12 and 13, May 2003.
Original source
Article written by Emilio Alfaro in the Magazine "Información y Actualidad Astronómica" of the Instituto de Astrofísica de Andalucía (IAA-CSIC), number 10, pages 12 and 13, May 2003.