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Bent Fuglede 1
@article{AFM_1996_21_1_a1, author = {Bent Fuglede}, title = {Harmonic morphisms between semi-riemannian manifolds}, journal = {Annales Fennici Mathematici}, pages = {31--50}, publisher = {mathdoc}, volume = {21}, number = {1}, year = {1996}, language = {en}, url = {http://geodesic.mathdoc.fr/item/AFM_1996_21_1_a1/} }
Bent Fuglede. Harmonic morphisms between semi-riemannian manifolds. Annales Fennici Mathematici, Tome 21 (1996) no. 1, pp. 31-50. http://geodesic.mathdoc.fr/item/AFM_1996_21_1_a1/