@incollection{Schmitz_2007,
    doi = {10.1007/978-3-540-73420-8_60},
    url = {https://doi.org/10.1007%2F978-3-540-73420-8_60},
    year = {2007},
    publisher = {Springer Berlin Heidelberg},
    pages = {692--703},
    author = {Sylvain Schmitz},
    title = {Conservative Ambiguity Detection in Context-Free Grammars},
    booktitle = {Automata, Languages and Programming}
}

@incollection{Schmitz_2007, doi = {10.1007/978-3-540-73420-8_60}, url = {https://doi.org/10.1007%2F978-3-540-73420-8_60}, year = {2007}, publisher = {Springer Berlin Heidelberg}, pages = {692--703}, author = {Sylvain Schmitz}, title = {Conservative Ambiguity Detection in Context-Free Grammars}, booktitle = {Automata, Languages and Programming} }