Article written by Emilio Alfaro in the Magazine "Información y Actualidad Astronómica" of the Instituto de Astrofísica de Andalucía (IAA-CSIC), number 1, pages 11 and 12, June 2000.
Original source
Article written by Emilio Alfaro in the Magazine "Información y Actualidad Astronómica" of the Instituto de Astrofísica de Andalucía (IAA-CSIC), number 1, pages 11 and 12, June 2000.