\bib{1964/straus}
\yr 1964
\by Ernst G. Straus
\paper Addition chains of vectors (problem 5125)
\jour American Mathematical Monthly
\issn 0002--9890
\vol 70
\pages 806--808
\url http://cr.yp.to/\allowbreak bib/\allowbreak entries.html#\allowbreak 1964/\allowbreak straus
\endref