@misc{2000-allan
,note={URL: {\tt http://cr.yp.to/\allowbreak bib/\allowbreak entries.html\#\allowbreak 2000/\allowbreak allan}. Note: Agilent application note 1289}
,author={David W. Allan and Neil Ashby and Clifford C. Hodge}
,title={{The science of timekeeping}}
,year={2000}
}