\bib{1978/graham}
\yr 1978
\mr 80d:68051
\by Ronald L. Graham
\by Andrew C. Yao
\by Frances F. Yao
\paper Addition chains with multiplicative cost
\jour Discrete Mathematics
\issn 0012--365X
\vol 23
\pages 115--119
\url http://cr.yp.to/\allowbreak bib/\allowbreak entries.html#\allowbreak 1978/\allowbreak graham
\endref