@article{DBLP:journals/tcs/Otto84a,
author = {Friedrich Otto},
title = {Some Undecidability Results for Non-Monadic Church-Rosser
Thue Systems},
journal = {Theor. Comput. Sci.},
volume = {33},
year = {1984},
pages = {261-278},
ee = {http://dx.doi.org/10.1016/0304-3975(84)90090-2},
bibsource = {DBLP, http://dblp.uni-trier.de}
}