@article{Kaliszyk_2007,
    doi = {10.1016/j.entcs.2006.09.021},
    url = {https://doi.org/10.1016%2Fj.entcs.2006.09.021},
    year = {2007},
    month = {may},
    publisher = {Elsevier {BV}},
    volume = {174},
    number = {2},
    pages = {49--61},
    author = {Cezary Kaliszyk},
    title = {Web Interfaces for Proof Assistants},
    journal = {Electronic Notes in Theoretical Computer Science}
}

@article{Kaliszyk_2007, doi = {10.1016/j.entcs.2006.09.021}, url = {https://doi.org/10.1016%2Fj.entcs.2006.09.021}, year = {2007}, month = {may}, publisher = {Elsevier {BV}}, volume = {174}, number = {2}, pages = {49--61}, author = {Cezary Kaliszyk}, title = {Web Interfaces for Proof Assistants}, journal = {Electronic Notes in Theoretical Computer Science} }