@incollection{Mehlhorn_1980,
    doi = {10.1007/3-540-10003-2_89},
    url = {https://doi.org/10.1007%2F3-540-10003-2_89},
    year = {1980},
    publisher = {Springer Berlin Heidelberg},
    pages = {422--435},
    author = {Kurt Mehlhorn},
    title = {Pebbling mountain ranges and its application to {DCFL}-recognition},
    booktitle = {Automata, Languages and Programming}
}

@incollection{Mehlhorn_1980, doi = {10.1007/3-540-10003-2_89}, url = {https://doi.org/10.1007%2F3-540-10003-2_89}, year = {1980}, publisher = {Springer Berlin Heidelberg}, pages = {422--435}, author = {Kurt Mehlhorn}, title = {Pebbling mountain ranges and its application to {DCFL}-recognition}, booktitle = {Automata, Languages and Programming} }