Latin text for the meditations

http://www.culture.com.au/brain_proj/descarte.htm

http://plato.stanford.edu/entries/descartes-epistemology/

http://serendip.brynmawr.edu/Mind/Table.html

http://www-phil.philengl.dundee.ac.uk/staff/gs/descartes/

http://www-groups.dcs.st-andrews.ac.uk/~history/Mathematicians/Descartes.html