Dictionary-free categorization of very similar objects via stacked evidence trees. - Gonzalo Martínez-Muñoz; Natalia Larios Delgado; Eric N. Mortensen; Wei Zhang 014; Asako Yamamuro; Robert Paasch; Nadia Payet; David A. Lytle; Linda G. Shapiro; Sinisa Todorovic; Andrew Moldenke; Thomas G. Dietterich (CVPR, 2009)