%0 Journal Article %A Ratto, Andrea %T Equivariant harmonic maps between manifolds with metrics of $(p, q)$-signature %J Annales de l'I.H.P. Analyse non linéaire %D 1989 %P 503-524 %V 6 %N 6 %I Gauthier-Villars %U http://www.numdam.org/item/AIHPC_1989__6_6_503_0/ %G en %F AIHPC_1989__6_6_503_0