@incollection{Alur_2006,
    doi = {10.1007/11779148_1},
    url = {https://doi.org/10.1007%2F11779148_1},
    year = {2006},
    publisher = {Springer Berlin Heidelberg},
    pages = {1--13},
    author = {Rajeev Alur and P. Madhusudan},
    title = {Adding Nesting Structure to Words},
    booktitle = {Developments in Language Theory}
}

@incollection{Alur_2006, doi = {10.1007/11779148_1}, url = {https://doi.org/10.1007%2F11779148_1}, year = {2006}, publisher = {Springer Berlin Heidelberg}, pages = {1--13}, author = {Rajeev Alur and P. Madhusudan}, title = {Adding Nesting Structure to Words}, booktitle = {Developments in Language Theory} }