%0 Journal Article %A HIROTA, RYOGO %A TAKAHASHI, DAISUKE %T ULTRADISCRETIZATION OF THE TZITZEICA EQUATION %J Glasgow mathematical journal %D 2005 %P 77-85 %V 47 %N A %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089505002302/ %R 10.1017/S0017089505002302 %F 10_1017_S0017089505002302