Full reference OpenMind biblio ref
Freudenthal, Gad, and Y.Tzvi Langermann. 1992. “Gersonides on the Magnet and the Heat of the Sun”. In Studies on Gersonides: A Fourteenth-Century Jewish Philosopher-Scientist, 267-84. Leiden: E. J Brill.
{ Gad Freudenthal, Y.Tzvi Langermann, 1992 #625 }