Rolf Niedermeier, Peter Rossmanith. Unambiguous Auxiliary Pushdown Automata and Semi-unbounded Fan-in Circuits. Inf. Comput., 118(2):227-245, May 1995.
@article{NiedermeierR95:1,
title = {Unambiguous Auxiliary Pushdown Automata and Semi-unbounded Fan-in Circuits},
author = {Rolf Niedermeier and Peter Rossmanith},
year = {1995},
month = {May},
researchr = {https://researchr.org/publication/NiedermeierR95%3A1},
cites = {0},
citedby = {0},
journal = {Inf. Comput.},
volume = {118},
number = {2},
pages = {227-245},
}