Ġiyāṯ al‐Dīn Abū al‐Fatḥ ʿUmar ibn Ibrāhīm al-Ḫayyāmī al‐Nīšābūrī

Reference works

• BEA

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

• Wikipedia
• EI2

  P. Bearman et al. (eds.). Encyclopaedia of Islam, Second Edition. Leiden: Brill.

• ENWC

  Helaine Selin (ed.). Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures. New York: Springer.

• EIr

  Ehsan Yarshater (ed.). Encyclopaedia Iranica. New York: Encyclopædia Iranica Foundation.

• OEPSTI

  Ibrahim Kalin (ed.). The Oxford Encyclopedia of Philosophy, Science, and Technology in Islam. Oxford: Oxford University Press.

• ISMI

  Islamic Scientific Manuscripts Initiative

• BEA

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