%0 Journal Article %A CURRÁS-BOSCH, CARLOS %T SINGULAR COTANGENT MODEL %J Glasgow mathematical journal %D 2015 %P 415-430 %V 57 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S001708951400038X/ %R 10.1017/S001708951400038X %F 10_1017_S001708951400038X