http://www-unix.oit.umass.edu/~rayner/

http://www.lireimage.uqam.ca/mod3/res3/pora90e.htm

http://bbsonline.cup.cam.ac.uk/documents/a/00/00/04/17/bbs00000417-00/

http://www.psy.gla.ac.uk/people/details.asp?ID=sara

http://lpe.psycho.univ-paris5.fr/page perso/Vitu-Thibault/Evitu.htm