Synchronous Digital Hierarchy Optical Metropolitan Network Ring Traffic Analysis. - Henry L. Owen; Carsten Wulf-Mathies (Eur. Trans. Telecommun., 1993)

A new approach to relevancy in Internet searching - the "Vox Populi Algorithm" - Andreas Schaale; Carsten Wulf-Mathies; Sönke Lieberam-Schmidt (CoRR, 2003)