al‐Malik al‐Ašraf ʿUmar ibn Yūsuf ibn ʿUmar ibn ʿAlī ibn Rasūl

Reference works

• BEA

  Thomas Hockey et al. (eds.). The Biographical Encyclopedia of Astronomers, Springer Reference. New York: Springer, 2007.

• Wikipedia
• ISMI

  Islamic Scientific Manuscripts Initiative

• BEA

  Thomas Hockey et al. (eds.). The Biographical Encyclopedia of Astronomers, Springer Reference. New York: Springer, 2007.