@article{Dam_1994,
    doi = {10.1016/0304-3975(94)90269-0},
    url = {https://doi.org/10.1016%2F0304-3975%2894%2990269-0},
    year = {1994},
    month = {apr},
    publisher = {Elsevier {BV}},
    volume = {126},
    number = {1},
    pages = {77--96},
    author = {Mads Dam},
    title = {{CTL}$\ast$ and {ECTL}$\ast$ as fragments of the modal {$\mu$}-calculus},
    journal = {Theoretical Computer Science}
}

@article{Dam_1994, doi = {10.1016/0304-3975(94)90269-0}, url = {https://doi.org/10.1016%2F0304-3975%2894%2990269-0}, year = {1994}, month = {apr}, publisher = {Elsevier {BV}}, volume = {126}, number = {1}, pages = {77--96}, author = {Mads Dam}, title = {{CTL}$\ast$ and {ECTL}$\ast$ as fragments of the modal {$\mu$}-calculus}, journal = {Theoretical Computer Science} }