Gilles Schaeffer Ekaterina A. Vassilieva A bijective proof of Jackson's formula for the number of factorizations of a cycle. 903-924 2008 115 J. Comb. Theory, Ser. A 6 http://dx.doi.org/10.1016/j.jcta.2007.12.002 db/journals/jct/jcta115.html#SchaefferV08