harmonique sphérique
1979 / Vector operators and spherical harmonics in quantum mechanics / M. Andrews / American Journal of Physics 47 (1979) p. 274 [doi]
1988 / Methods of Spherical Harmonic Analysis / Lindy Brett / Quarterly Journal of the Royal Astronomical Society 29 (1988) p. 129 [lien]
2003 / À la recherche des harmoniques / Marcel Berger / Dossier Pour la Science 41 (2003) p. 44