@incollection{Plandowski_1994,
    doi = {10.1007/bfb0049431},
    url = {https://doi.org/10.1007%2Fbfb0049431},
    year = {1994},
    publisher = {Springer Berlin Heidelberg},
    pages = {460--470},
    author = {Wojciech Plandowski},
    title = {Testing equivalence of morphisms on context-free languages},
    booktitle = {Algorithms - {ESA} {\textquotesingle}94}
}

@incollection{Plandowski_1994, doi = {10.1007/bfb0049431}, url = {https://doi.org/10.1007%2Fbfb0049431}, year = {1994}, publisher = {Springer Berlin Heidelberg}, pages = {460--470}, author = {Wojciech Plandowski}, title = {Testing equivalence of morphisms on context-free languages}, booktitle = {Algorithms - {ESA} {\textquotesingle}94} }