@article{ITA_2009__43_1_1_0,
     author = {Foustoucos, Eug\'enie and Guessarian, Ir\`ene},
     title = {Inf-datalog, modal logic and complexities},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {1--21},
     publisher = {EDP-Sciences},
     volume = {43},
     number = {1},
     year = {2009},
     doi = {10.1051/ita:2007043},
     mrnumber = {2483442},
     zbl = {1170.68015},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ita:2007043/}
}