\bib{1976/thurber}
\yr 1976
\mr 55:5570
\by Edward G. Thurber
\paper Addition chains and solutions of $l(2n)=l(n)$ and $l(2^n-1)=n+l(n)-1$
\jour Discrete Mathematics
\issn 0012--365X
\vol 16
\pages 279--289
\url http://cr.yp.to/\allowbreak bib/\allowbreak entries.html#\allowbreak 1976/\allowbreak thurber
\endref