@inproceedings{seppanen-1982-recursive,
    title = "Recursive Functions for Computation of Natural Secret Languages",
    author = "Seppanen, Jouko J.",
    booktitle = "{C}oling 1982 Abstracts: Proceedings of the {N}inth {I}nternational {C}onference on {C}omputational {L}inguistics Abstracts",
    year = "1982",
    url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/C82-2062/"
}