@incollection{sep-logic-epistemic,
    author       = {Rendsvig, Rasmus~K. and Symons, John},
    title        = {Epistemic Logic},
    booktitle    = {The Stanford Encyclopedia of Philosophy},
    editor       = {Edward N. Zalta},
    howpublished = {\url{https://plato.stanford.edu/archives/sum2019/entries/logic-epistemic/}},
    year         = {2019},
    edition      = {Summer 2019},
    publisher    = {Metaphysics Research Lab, Stanford University},
    url          = {https://plato.stanford.edu/entries/logic-epistemic/}
}