@article{dmtcs:2164,
    title      = {Permutations of context-free, ET0L and indexed languages},
    author     = {Tara Brough and Laura Ciobanu and Murray Elder and Georg Zetzsche},
    url        = {https://dmtcs.episciences.org/2164},
    doi        = {10.46298/dmtcs.2164},
    journal    = {Discrete Mathematics \& Theoretical Computer Science},
    issn       = {1365-8050},
    volume     = {Vol. 17 no. 3},
    issuetitle = {Automata, Logic and Semantics},
    eid        = 21,
    year       = {2016},
    month      = {May},
    keywords   = {cyclic closure, context-free, ET0L, EDT0L, indexed, [INFO.INFO-DM] Computer Science [cs]/Discrete Mathematics [cs.DM]},
    language   = {English},
}