Bernard De Baets Hans De Meyer Toward Graded and Nongraded Variants of Stochastic Dominance. 261-274 2007 Perception-based Data Mining and Decision Making in Economics and Finance http://dx.doi.org/10.1007/978-3-540-36247-0_10 series/sci/2007-36 db/series/sci/sci36.html#BaetsM07