KhayyaÌ„m, H. Ê. (1902). RubaÌ„Ê»iÌ„yaÌ„t-i HÌ£akiÌ„m Ê»Umar KhayyaÌ„m /. ChaÌ„pkhaÌ„nah Ê»IlmiÌ„,.