@inproceedings{Gradel,
    doi = {10.1109/lics.1997.614957},
    url = {https://doi.org/10.1109%2Flics.1997.614957},
    publisher = {{IEEE} Comput. Soc},
    author = {E. Gradel and M. Otto and E. Rosen},
    title = {Two-variable logic with counting is decidable},
    booktitle = {Proceedings of Twelfth Annual {IEEE} Symposium on Logic in Computer Science}
}

@inproceedings{Gradel, doi = {10.1109/lics.1997.614957}, url = {https://doi.org/10.1109%2Flics.1997.614957}, publisher = {{IEEE} Comput. Soc}, author = {E. Gradel and M. Otto and E. Rosen}, title = {Two-variable logic with counting is decidable}, booktitle = {Proceedings of Twelfth Annual {IEEE} Symposium on Logic in Computer Science} }