Reference:

E. Best, L. Cherkasova, J. Desel, and J. Esparza. Traps, free choice und home states (extended abstract). In W. Thomas M. Kwiatowska, M. Shields, editor, Semantics for Concurrency, Leicester 1990, Workshops in Computing, pages 16–21. Springer-Verlag, 1991.

Suggested BibTeX entry:

@inproceedings{BCDE91,
    author = {E. Best and L. Cherkasova and J. Desel and J. Esparza},
    booktitle = {Semantics for Concurrency, Leicester 1990},
    editor = {M. Kwiatowska, M. Shields, W. Thomas},
    pages = {16-21},
    publisher = {Springer-Verlag},
    series = {Workshops in Computing},
    title = {Traps, Free Choice und Home States (extended abstract)},
    year = {1991}
}