@inproceedings{Groetschel1992, author = {Martin Gr{\"o}tschel}, title = {Theoretical and practical aspects of combinatorial problem solving}, booktitle = {Proceedings of the third annual ACM-SIAM symposium on discrete algorithms,held January 27-29, 1992, in Orlando, FL, USA}, editor = {Greg Frederickson}, pages = {195}, year = {1992}, }