BIBLIOGRAPHY REFERENCE: BOOK Umar Khayyom - matematik olim Author Muhabbat Ahadova (Author) Year of Publication 1972 City Tashkent Other Numbers 11476 See reference for OpenMind ISMI items with this reference Person: Ġiyāṯ al-Dīn Abū al-Fatḥ ʿUmar ibn Ibrāhīm al-Ḫayyāmī al-Nīšāpūrī