%0 Journal Article %A VIALLET, CLAUDE M. %T INTEGRABLE LATTICE MAPS: QV, A RATIONAL VERSION OF Q4 %J Glasgow mathematical journal %D 2009 %P 157-163 %V 51 %N A %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089508004874/ %R 10.1017/S0017089508004874 %F 10_1017_S0017089508004874