@incollection{Basten_2010,
    doi = {10.1007/978-3-642-14808-8_6},
    url = {https://doi.org/10.1007%2F978-3-642-14808-8_6},
    year = {2010},
    publisher = {Springer Berlin Heidelberg},
    pages = {76--90},
    author = {H. J. S. Basten},
    title = {Tracking Down the Origins of Ambiguity in Context-Free Grammars},
    booktitle = {Lecture Notes in Computer Science}
}

@incollection{Basten_2010, doi = {10.1007/978-3-642-14808-8_6}, url = {https://doi.org/10.1007%2F978-3-642-14808-8_6}, year = {2010}, publisher = {Springer Berlin Heidelberg}, pages = {76--90}, author = {H. J. S. Basten}, title = {Tracking Down the Origins of Ambiguity in Context-Free Grammars}, booktitle = {Lecture Notes in Computer Science} }