University of Washington'dan çözümlü bir örnek: https://i72.servimg.com/u/f72/19/97/10/39/tumeva11.png https://www.dropbox.com/s/xq25chnnvkxvv19/MSC2_solutions_s12_124a.pdf (Soru 1)
University of Alberta'dan: https://i.servimg.com/u/f72/19/97/10/39/induct10.png http://www.math.ualberta.ca/~bowman/m100/m100.pdf (Sayfa 25, Problem 1.7)