Ira M. Gessel Lun Lv Guoce Xin Yue Zhou A unified elementary approach to the Dyson, Morris, Aomoto, and Forrester constant term identities. 1417-1435 2008 115 J. Comb. Theory, Ser. A 8 http://dx.doi.org/10.1016/j.jcta.2008.02.006 db/journals/jct/jcta115.html#GesselLXZ08