@article{fkm15,
          volume = {166},
          number = {3},
           month = {March},
          author = {Melvin Fitting and Roman Kuznets},
           title = {Modal interpolation via nested sequents},
       publisher = {Elsevier},
            year = {2015},
         journal = {Annals of pure and applied logic},
           pages = {274--305},
             url = {2015/fkm15.pdf},
        abstract = {The main method of proving the Craig Interpolation Property
                   (CIP) constructively uses cut-free sequent proof systems.
                   Until now, however, no such method has been known for proving
                   the CIP using more general sequent-like proof formalisms, such
                   as hypersequents, nested sequents, and labelled sequents. In
                   this paper, we start closing this gap by presenting an
                   algorithm for proving the CIP for modal logics by induction
                   on a nested-sequent derivation. This algorithm is applied to
                   all the logics of the so-called modal cube.}
}

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