%0 Journal Article %A GLĂ–CKNER, HELGE %T ULTRAMETRIC AND NON-LOCALLY CONVEX ANALOGUES OF THE GENERAL CURVE LEMMA OF CONVENIENT DIFFERENTIAL CALCULUS %J Glasgow mathematical journal %D 2008 %P 271-288 %V 50 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089508004199/ %R 10.1017/S0017089508004199 %F 10_1017_S0017089508004199