List of citations in Numdam for : The structure of extremals of a class of second order variational problems
Annales de l'I.H.P. Analyse non linéaire, Volume 16 (1999) no. 5, pp. 593-629.
Annales de l'I.H.P. Analyse non linéaire, Volume 27 (2010) no. 1, pp. 57-72.
ESAIM: Control, Optimisation and Calculus of Variations, Volume 15 (2009) no. 4, pp. 872-894.
Annales de l'I.H.P. Analyse non linéaire, Volume 23 (2006) no. 6, pp. 929-948.
Annales de l'I.H.P. Analyse non linéaire, Volume 19 (2002) no. 3, pp. 343-370.