A Hierarchical System for Recognition, Tracking and Pose Estimation. - Philipp Zehnder 002; Esther Koller-Meier; Luc Van Gool (MLMI, 2004)

Efficient, Simultaneous Detection of Multiple Object Classes. - Philipp Zehnder 002; Esther Koller-Meier; Luc Van Gool (ICPR (1), 2006)

An Efficient Shared Multi-Class Detection Cascade. - Philipp Zehnder 002; Esther Koller-Meier; Luc Van Gool (BMVC, 2008)

Efficient multi-class object detection. - Philipp Zehnder 002 (2009)