@inproceedings{1979-schroeppel ,note={URL: {\tt http://cr.yp.to/\allowbreak bib/\allowbreak entries.html\#\allowbreak 1979/\allowbreak schroeppel}. Note: see also newer version $0} ,author={Richard Schroeppel and Adi Shamir} ,crossref={1979--focs} ,MR={82b:68039} ,pages={328--336} ,title={{A $T\cdot S^2=O(2^n)$ time/space tradeoff for certain NP-complete problems}} ,year={1979} }