@inproceedings{Waddell:modules,
author = {Oscar Waddell and R. Kent Dybvig},
title = {Extending the Scope of Syntactic Abstraction},
booktitle = {Conference Record of the Twenty Sixth Annual {ACM}
                    Symposium on Principles of Programming Languages},
month = jan,
year = 1999,
pages = {203--213},
texturl = "http://www.cs.indiana.edu/~dyb/pubs/popl99.pdf",
annote = {Describes the Chez Scheme module system and its
interaction with the syntax-case expander.}}