Retrieved 2013-07-16. ↑ Saliba (1994) p.60, pp.67-69. ↑ Belo (2007) p.228. ↑ George Saliba, Avicenna: 'viii. Mathematics and Physical Sciences'. Encyclopaedia Iranica, Online Edition, 2011, available at http://www.iranicaonline.org/articles/avicenna-viii 1 2 Nick Kanas, Star Maps: History, Artistry, and Cartography, p.79 (Springer, 2007). ↑ British Library: Learning Bodies of Knowledge ‘Medieval Astrology’ https://web.archive.org/web/20130305064820/http://www.bl.uk/learning/artimages/bodies/astrology/astrologyhome.html (25 Octobre 2016) ↑ Lewis, James R. (2003).