Full reference OpenMind biblio ref
Berggren, J.Lennart, David King, and George Saliba. 1987. “Spherical Trigonometry In Kūshyār Ibn Labbān's Jāmiʿ Zīj”. In From Deferent To Equant: A Volume Of Studies In The History Of Science In The Ancient And Medieval Near East In Honor Of E. S. Kennedy, 15-33. New York: Academy of Sciences.
{ J.Lennart Berggren, David King, George Saliba, 1987 #1150 }