Liste des citations dans Numdam pour : On the validity of Huygens' principle for second order partial differential equations with four independent variables. II. A sixth necessary condition

Annales de l'I.H.P. Physique théorique, Tome 61 (1994), p. 373-432 / Harvested from Numdam

Anderson, W. G. ; McLenaghan, R. G. ; Sasse, F. D.

Huygens' principle for the non-self-adjoint scalar wave equation on Petrov type III space-times
Annales de l'I.H.P. Physique théorique, Tome 71 (1999), p. 259-276 / Harvested from Numdam