List of citations in Numdam for : An explicit determination of the Petrov type N space-times on which the conformally invariant scalar wave equation satisfies Huygens' principle

Annales de l'I.H.P. Physique théorique, Volume 44 (1986) no. 2, pp. 115-153.

Annales de l'I.H.P. Physique théorique, Volume 70 (1999) no. 3, pp. 313-340.



Annales de l'I.H.P. Physique théorique, Volume 61 (1994) no. 1, pp. 87-102.