* [http://www.hps.pitt.edu/profile/lennox.php James G. Lennox]
* [http://www.hps.pitt.edu/profile/mitchell.php Sandra Mitchell]* [http://www.hps.pitt.edu/profile/schaffner.php Kenneth F. Schaffner]
=== [http://sydney.edu.au/arts/philosophy/ University of Sydney] ===