\bib{1991/perry}
\yr 1991
\by Dewayne E. Perry
\paper Dimensions of consistency in source versions and system compositions (extended abstract)
\pages 29--32
\inbook \cite{1991/feiler-book}
\url http://grosskurth.ca/\allowbreak bib/\allowbreak entries.html#\allowbreak 1991/\allowbreak perry
\endref
