List of citations in Numdam for : Perturbation of harmonic structures and an index-zero theorem
Annales de l'Institut Fourier, Volume 20 (1970) no. 1, pp. 317-359.
Séminaire Brelot-Choquet-Deny. Théorie du potentiel, Volume 14 (1970-1971), Talk no. 6, 1 p.
