Unsupervised On-line Learning of Decision Trees for Hierarchical Data Analysis. - Marcus Held; Joachim M. Buhmann (NIPS, 1997)

On Spatial Quantization of Color Images. - Jens Ketterer; Jan Puzicha; Marcus Held; Martin Fischer 005; Joachim M. Buhmann; Dieter W. Fellner (ECCV (1), 1998)

Visualizing Group Structure. - Marcus Held; Jan Puzicha; Joachim M. Buhmann (NIPS, 1998)

Dithered Color Quantization. - Joachim M. Buhmann; Dieter W. Fellner; Marcus Held; Jens Ketterer; Jan Puzicha (Comput. Graph. Forum, 1998)

Model Selection in Clustering by Uniform Convergence Bounds. - Joachim M. Buhmann; Marcus Held (NIPS, 1999)

On spatial quantization of color images. - Jan Puzicha; Marcus Held; Jens Ketterer; Joachim M. Buhmann; Dieter W. Fellner (IEEE Trans. Image Process., 2000)