maimonides

http://www.holidayinisrael.com/ViewPage.asp?lid=5&pid=371

http://yediah.blogspot.com/2007/01/miracles-ramban-and-rambam-two-opposing.html

http://www.jtsa.edu/Conservative_Judaism/Ramban_Biography.xml

http://www.anm.org.ve/FTPANM/online/Biblioteca/MAIMONIDES%20%20II.pdf