@inproceedings{Dybvig:arityprelim,
author = {R. Kent Dybvig and Robert Hieb},
title = {A Variable-arity Procedural Interface},
booktitle = {Proceedings of the 1988 {ACM} Conference on {Lisp}
                   and Functional Programming},
pages = {106--115},
month = jul,
year = 1988,
annote = {Preliminary version of~\cite{Dybvig:arity}.}}