John Buridan on the Acquisition of Simple Substantial Concepts - A paper by Gyula Klima. Focuses on how Buridan's Aristotelianism helped him to maintain an empiricist standpoint without sliding into skepticism. - http://www.fordham.edu/gsas/phil/klima/BuridanSubstantialConcepts.htm
The Summulae of John Buridan - A critical introduction by Gyula Klima to Buridan's main work in logic. - http://www.fordham.edu/gsas/phil/klima/Intro.htm
Jean Buridan - Article from the Catholic Encyclopedia. - http://www.newadvent.org/cathen/03078a.htm
John Buridan - Life and work of this late Medieval philosopher; from the Stanford Encyclopedia by Jack Zupko. - http://plato.stanford.edu/entries/buridan/