@article{1989-olsson ,note={URL: {\tt http://grosskurth.ca/\allowbreak bib/\allowbreak entries.html\#\allowbreak 1989/\allowbreak olsson}} ,author={Ronald A. Olsson and Gregory R. Whitehead} ,ISSN={0038--0644} ,journal={Software---Practice \& Experience} ,number={8} ,pages={757--773} ,title={{A simple technique for automatic recompilation in modular programming languages}} ,volume={19} ,year={1989} }