@article{1981-schroeppel
,note={Note: see also older version $0}
,author={Richard Schroeppel and Adi Shamir}
,ISSN={0097--5397}
,journal={SIAM Journal on Computing}
,MR={83a:90116}
,pages={456--464}
,title={{A $T=O(2^{n/2})$, $S=O(2^{n/4})$ algorithm for certain NP-complete problems}}
,volume={10}
,year={1981}
}