\bib{2000/allan}
\yr 2000
\by David W. Allan
\by Neil Ashby
\by Clifford C. Hodge
\paper The science of timekeeping
\paperinfo Agilent application note 1289
\url http://cr.yp.to/\allowbreak bib/\allowbreak entries.html#\allowbreak 2000/\allowbreak allan
\endref