\bib{1975/schoenhage}
\yr 1975
\mr 57:18229
\by Arnold Sch\"onhage
\paper A lower bound for the length of addition chains
\jour Theoretical Computer Science
\issn 0304--3975
\vol 1
\pages 1--12
\url http://cr.yp.to/\allowbreak bib/\allowbreak entries.html#\allowbreak 1975/\allowbreak schoenhage
\endref