Annales de l'Institut Henri Poincaré. C, Analyse non linéaire, Volume 18 (2001) no. 4

Mora, Maria Giovanna; Morini, Massimiliano

p. 403-436

Arcoya, David; Boccardo, Lucio; Orsina, Luigi

p. 437-457

Geometric approach to Goursat flags

Montgomery, Richard; Zhitomirskii, Michail

p. 459-493

Lower semicontinuity of

L^{\infty}

Barron, E. N.; Jensen, R. R.; Wang, C. Y.

p. 495-517