@article{lmcs:1216,
    title      = {Piecewise testable tree languages},
    author     = {Mikołaj Bojańczyk and Luc Segoufin and Howard Straubing},
    url        = {https://lmcs.episciences.org/1216},
    doi        = {10.2168/LMCS-8(3:26)2012},
    journal    = {Logical Methods in Computer Science},
    issn       = {1860-5974},
    volume     = {Volume 8, Issue 3},
    eid        = 26,
    year       = {2012},
    month      = {Sep},
    keywords   = {Computer Science - Formal Languages and Automata Theory, F.4.3,F.4.1},
}