List of citations in Numdam for : Extremal domains for the first eigenvalue of the Laplace-Beltrami operator
Annales de l'Institut Fourier, Volume 59 (2009) no. 2, pp. 515-542.
ESAIM: Control, Optimisation and Calculus of Variations, Volume 23 (2017) no. 2, pp. 685-720.
Annales de l'I.H.P. Analyse non linéaire, Volume 31 (2014) no. 6, pp. 1231-1265.