On-line q -adic covering by the method of the n -th segment and its application to on-line covering by cubes. Januszewski, Janusz; Lassak, Marek; Rote, Günter; Woeginger, Gerhard — 1996 Beiträge zur Algebra und Geometrie
The disjoint cliques problem Klaus Jansen; Petra Scheffler; Gerhard Woeginger — 1997 RAIRO - Operations Research - Recherche Opérationnelle