http://www.math.colostate.edu/~spriggs/m130/voting2.pdfwww.ctl.ua.edu/math103/voting/methodof.htmhttp://www.math.binghamton.edu/math130/chapter1/maselimination.htmlhttp://www.math.binghamton.edu/math130/chapter1/plur_elim_calc.htmlhttp://www.fairvote.org/?page=19