Història de l'astronomia (Catalan Wikipedia)

Analysis of information sources in references of the Wikipedia article "Història de l'astronomia" in Catalan language version.

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Krupp, Edwin C. Echoes of the Ancient Skies: The Astronomy of Lost Civilizations. Courier Dover Publications, 2003, p. 62–72. ISBN 0-486-42882-6 [Consulta: 12 abril 2011].
Bosworth, Clifford Edmund; Asimov, Moukhamed Saïfitdinovitch. History of Civilizations of Central Asia: The age of achievement: A.D. 750 to the end of the fifteen century (en anglès). Motilal Banarsidass Publ., 2003, p.178-179. ISBN 8120815963.
(castellà) José Augusto Sánchez Pérez i Rafael Pérez Gómez, Biografías de matemáticos árabes que florecieron en España, p.80-83

Nilsson, Martin P. Primitive Time-Reckoning. A Study in the Origins and Development of the Art of Counting Time among the Primitive and Early Culture Peoples. 1. C. W. K. Gleerup, 1920. OCLC 458893999.