@inproceedings{STOC-1973-Johnson,
	author        = "David S. Johnson",
	booktitle     = "{Proceedings of the Fifth Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800125.804034",
	pages         = "38--49",
	publisher     = "{ACM}",
	title         = "{Approximation Algorithms for Combinatorial Problems}",
	year          = 1973,
}