@article{ITA_2007__41_2_177_0,
     author = {Lange, Martin},
     title = {Three notes on the complexity of model checking fixpoint logic with chop},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {177--190},
     publisher = {EDP-Sciences},
     volume = {41},
     number = {2},
     year = {2007},
     doi = {10.1051/ita:2007011},
     mrnumber = {2350643},
     zbl = {1133.68046},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/ita:2007011/}
}