@incollection{Brabrand,
    doi = {10.1007/978-3-540-76336-9_21},
    url = {https://doi.org/10.1007%2F978-3-540-76336-9_21},
    publisher = {Springer Berlin Heidelberg},
    pages = {214--225},
    author = {Claus Brabrand and Robert Giegerich and Anders M{\o}ller},
    title = {Analyzing Ambiguity of Context-Free Grammars},
    booktitle = {Implementation and Application of Automata}
}

@incollection{Brabrand, doi = {10.1007/978-3-540-76336-9_21}, url = {https://doi.org/10.1007%2F978-3-540-76336-9_21}, publisher = {Springer Berlin Heidelberg}, pages = {214--225}, author = {Claus Brabrand and Robert Giegerich and Anders M{\o}ller}, title = {Analyzing Ambiguity of Context-Free Grammars}, booktitle = {Implementation and Application of Automata} }