@article{PIM_1997_N_S_61_75_a12,
     author = {J. C. Gonz\'alez-D\'avila and L. Vanhecke},
     title = {Normal {Flows} and {Harmonic} {Manifolds}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {105 },
     publisher = {mathdoc},
     volume = {_N_S_61},
     number = {75},
     year = {1997},
     zbl = {0885.53049},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1997_N_S_61_75_a12/}
}