An explicit determination of the space-times on which the conformally invariant scalar wave equation satisfies Huygens' principle. — Part II : Petrov type D space-times J. Carminati; R. G. McLenaghan — 1987 Annales de l'I.H.P. Physique théorique
An explicit determination of the Petrov type N space-times on which the conformally invariant scalar wave equation satisfies Huygens' principle J. Carminati; R. G. McLenaghan — 1986 Annales de l'I.H.P. Physique théorique
An explicit determination of the space-times on which the conformally invariant scalar wave equation satisfies Huygens' principle. Part III : Petrov type III space-times J. Carminati; R. G. McLenaghan — 1988 Annales de l'I.H.P. Physique théorique
Consequences of the validity of Huygens' principle for the conformally invariant scalar wave equation, Weyl's neutrino equation and Maxwell's equations on Petrov type II space-times J. Carminati; S. R. Czapor; R. G. McLenaghan; G. C. Williams — 1991 Annales de l'I.H.P. Physique théorique