@article{1973-thurber
,note={URL: {\tt http://cr.yp.to/\allowbreak bib/\allowbreak entries.html\#\allowbreak 1973/\allowbreak thurber}}
,author={Edward G. Thurber}
,ISSN={0012--7094}
,journal={Duke Mathematical Journal}
,MR={48:8429}
,pages={907--913}
,title={{On addition chains $l(mn)\le l(n)-b$ and lower bounds for $c(r)$}}
,volume={40}
,year={1973}
}