Full reference OpenMind biblio ref
Saliba, George. 1985. “The Determination of Solar Eccentricity and Apogee According to Muʾayyad al‐Dīn al‐ʿUrḍī (d. 1266 A.D.)”. Zeitschrift für Geschichte Der Arabisch Islamischen Wissenschaften 2: 47-67.
{ George Saliba, 1985 #241 }