Khalil, A. (1995). Mathematical Figures in the Rubaiyat of omar khayyam. test, 4(4), 63-85. doi: 10.21608/qarts.1995.113617
Ahmed,H Khalil. "Mathematical Figures in the Rubaiyat of omar khayyam". test, 4, 4, 1995, 63-85. doi: 10.21608/qarts.1995.113617
Khalil, A. (1995). 'Mathematical Figures in the Rubaiyat of omar khayyam', test, 4(4), pp. 63-85. doi: 10.21608/qarts.1995.113617
Khalil, A. Mathematical Figures in the Rubaiyat of omar khayyam. test, 1995; 4(4): 63-85. doi: 10.21608/qarts.1995.113617