@incollection{Place_2017,
    doi = {10.1007/978-3-319-58747-9_5},
    url = {https://doi.org/10.1007%2F978-3-319-58747-9_5},
    year = {2017},
    publisher = {Springer International Publishing},
    pages = {25--37},
    author = {Thomas Place and Marc Zeitoun},
    title = {Concatenation Hierarchies: New Bottle, Old Wine},
    booktitle = {Computer Science {\textendash} Theory and Applications}
}

@incollection{Place_2017, doi = {10.1007/978-3-319-58747-9_5}, url = {https://doi.org/10.1007%2F978-3-319-58747-9_5}, year = {2017}, publisher = {Springer International Publishing}, pages = {25--37}, author = {Thomas Place and Marc Zeitoun}, title = {Concatenation Hierarchies: New Bottle, Old Wine}, booktitle = {Computer Science {\textendash} Theory and Applications} }