@article{Bozzelli_2013,
    doi = {10.1007/s00236-013-0190-6},
    url = {https://doi.org/10.1007%2Fs00236-013-0190-6},
    year = {2013},
    month = {dec},
    publisher = {Springer Science and Business Media {LLC}},
    volume = {51},
    number = {1},
    pages = {25--49},
    author = {Laura Bozzelli and C{\'{e}}sar S{\'{a}}nchez},
    title = {Visibly rational expressions},
    journal = {Acta Informatica}
}

@article{Bozzelli_2013, doi = {10.1007/s00236-013-0190-6}, url = {https://doi.org/10.1007%2Fs00236-013-0190-6}, year = {2013}, month = {dec}, publisher = {Springer Science and Business Media {LLC}}, volume = {51}, number = {1}, pages = {25--49}, author = {Laura Bozzelli and C{\'{e}}sar S{\'{a}}nchez}, title = {Visibly rational expressions}, journal = {Acta Informatica} }