@incollection{Kurucz_2007,
    doi = {10.1016/s1570-2464(07)80018-8},
    url = {https://doi.org/10.1016%2Fs1570-2464%2807%2980018-8},
    year = {2007},
    publisher = {Elsevier},
    pages = {869--924},
    author = {Agi Kurucz},
    title = {15 Combining modal logics},
    booktitle = {Handbook of Modal Logic}
}

@incollection{Kurucz_2007, doi = {10.1016/s1570-2464(07)80018-8}, url = {https://doi.org/10.1016%2Fs1570-2464%2807%2980018-8}, year = {2007}, publisher = {Elsevier}, pages = {869--924}, author = {Agi Kurucz}, title = {15 Combining modal logics}, booktitle = {Handbook of Modal Logic} }