Louis G. & Kumar A.S. (2006). The red rain phenomenon of Kerala and its possible extraterrestrial origin. Astrophysics and Space Science, 584(1). (full paper (PDF)[永久失效連結]) (at journal website[永久失效連結])
Louis G. & Kumar A.S. (2006). The red rain phenomenon of Kerala and its possible extraterrestrial origin. Astrophysics and Space Science, 584(1). (full paper (PDF)[永久失效連結]) (at journal website[永久失效連結])