@incollection{MSMF_1984_2_16__11_0,
     author = {Thomas, Wolfgang},
     title = {An application of the {Ehrenfeucht-Fraisse} game in formal language theory},
     booktitle = {Compte-rendu de la table ronde de logique des 15 et 16 octobre 1983 \`a Paris},
     editor = {Delon, F. and Lascar, D. and Parigot, M. and Sabbagh, G.},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {11--21},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {16},
     year = {1984},
     doi = {10.24033/msmf.309},
     mrnumber = {87a:68103},
     zbl = {0558.68064},
     url = {http://archive.numdam.org/articles/10.24033/msmf.309/}
}