1. Special graph classes - a survey;Brandstädt;Tech. Report Gerhard-Mercator-Universität - Gesamthochschule Duisburg SM-DU-199,1991
2. Perfect elimination orderings of chordal powers of graphs;Brandstädt,1994
3. Dually chordal graphs;Brandstädt,1994
4. r-dominating cliques in Helly graphs and chordal graphs;Dragan,1994
5. Location problems in graphs and the Helly property (in Russian);Dragan;Discrete Math.,1992