List of citations in Numdam for : Algebras of differentiable functions in the plane
Annales de l'Institut Fourier, Volume 13 (1963) no. 2, pp. 75-89.
Annales de l'Institut Fourier, Volume 17 (1967) no. 2, pp. 261-279.
Annales de l'Institut Fourier, Volume 14 (1964) no. 2, pp. 145-161.
