Livingston, John W. «Ibn Qayyim al-Jawziyyah: A Fourteenth Century Defense against Astrological Divination and Alchemical Transmutation». Journal of the American Oriental Society, 91, 1, 1971, p. 96–103 [99]. DOI: 10.2307/600445.
McMahon, R. «Journey to the birth of the Universe». Nature, 443, 2006, pàg. 151. DOI: 10.1038/443151a.
O'Connor, J. J.; Robertson, E. F. «Galileo Galilei». University of St. Andrews, November 2002. [Consulta: 8 gener 2007].
st-andrews.ac.uk
mathshistory.st-andrews.ac.uk
O'Connor, John J.; Robertson, Edmund F. «Abu Rayhan Muhammad ibn Ahmad al-Biruni» (en anglès). MacTutor History of Mathematics archive. School of Mathematics and Statistics, University of St Andrews, Scotland.