%0 Journal Article %J In KI-94: Advances in artificial intelligence %D 1994 %T Cooperating to be noncooperative: The dialog system PRACMA %A Jameson,A. %A Ndiaye,A. %A Schafer,R. %A Simons,J. %A Weis,T. %A Zimmermann,D. %P 106--117 - 106--117 %U http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.29.6070 %8 1994///