@incollection{Grumberg_2010,
    doi = {10.1007/978-3-642-13089-2_47},
    url = {https://doi.org/10.1007%2F978-3-642-13089-2_47},
    year = {2010},
    publisher = {Springer Berlin Heidelberg},
    pages = {561--572},
    author = {Orna Grumberg and Orna Kupferman and Sarai Sheinvald},
    title = {Variable Automata over Infinite Alphabets},
    booktitle = {Language and Automata Theory and Applications}
}

@incollection{Grumberg_2010, doi = {10.1007/978-3-642-13089-2_47}, url = {https://doi.org/10.1007%2F978-3-642-13089-2_47}, year = {2010}, publisher = {Springer Berlin Heidelberg}, pages = {561--572}, author = {Orna Grumberg and Orna Kupferman and Sarai Sheinvald}, title = {Variable Automata over Infinite Alphabets}, booktitle = {Language and Automata Theory and Applications} }