Real-time active shape models for face segmentation. - Bernhard Fröba; Thorsten Kastner; Walter Zink; Christian Kiiblbeck (ICIP (1), 2001)

On the Combination of Different Template Matching Strategies for Fast Face Detection. - Bernhard Fröba; Walter Zink (Multiple Classifier Systems, 2001)

Watch these Lips: Motion Segmentation of Human Speech and Voice Organs. - Sven Friedl; Walter Zink; Bernhard Fröba; Thomas Wittenberg (VMV, 2002)