Martin Kummer. Negative Results about the Length Problem. In Egon Börger, editor, Computation Theory and Logic, In Memory of Dieter Rödding. Volume 270 of Lecture Notes in Computer Science, pages 237-248, Springer, 1987.
@inproceedings{Kummer87,
title = {Negative Results about the Length Problem},
author = {Martin Kummer},
year = {1987},
researchr = {https://researchr.org/publication/Kummer87},
cites = {0},
citedby = {0},
pages = {237-248},
booktitle = {Computation Theory and Logic, In Memory of Dieter Rödding},
editor = {Egon Börger},
volume = {270},
series = {Lecture Notes in Computer Science},
publisher = {Springer},
isbn = {3-540-18170-9},
}