Algorithms - ESA '97 5th Annual European Symposium, Graz, Austria, September 15-17, 1997. Proceedings Burkard Rainer E. Heftet / 1997 / Engelsk
Integer Programming and Combinatorial Optimization 7th International IPCO Conference, Graz, Austria, June 9-11, 1999, Proceedings Cornuejols Gerard Heftet / 1999 / Engelsk
