@article{ITA_2004__38_4_343_0,
     author = {Grohe, Martin and Schweikardt, Nicole},
     title = {Comparing the succinctness of monadic query languages over finite trees},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {343--373},
     publisher = {EDP-Sciences},
     volume = {38},
     number = {4},
     year = {2004},
     doi = {10.1051/ita:2004017},
     mrnumber = {2098195},
     zbl = {1067.03018},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/ita:2004017/}
}