STEINER-Diagrams. - Ulrich Blasum; Winfried Hochstättler; Peter Oertel (Electron. Notes Discret. Math., 1999)

Scheduling trams in the morning. - Ulrich Blasum; Michael R. Bussieck; Winfried Hochstättler; Christoph Moll; Hans-Helmut Scheel; Thomas Winter (Math. Methods Oper. Res., 1999)

Steiner diagrams and k-star hubs. - Ulrich Blasum; Winfried Hochstättler; Peter Oertel; Gerhard J. Woeginger (J. Discrete Algorithms, 2007)