http://www.math.washington.edu/~king/coursedir/m444a02/lab/lab10.html
http://www.math.washington.edu/~king/coursedir/m444a04/class/class29.html
http://www.math.washington.edu/~king/coursedir/m445w05/as/projects/FERMAT%20POINTQuest.html
http://faculty.evansville.edu/ck6/tcenters/class/fermat.html
http://www.math.washington.edu/~king/coursedir/m444a03/wk10.html
http://www.math.washington.edu/~king/coursedir/m444a03/notes/12-05-Napoleon-Fermat.html