@article{MZ_1981__178_173122,
     author = {Lieven Vanhecke},
     title = {A {Conjecture} of {Besse} on {Harmonic} {Manifolds.}},
     journal = {Mathematische Zeitschrift},
     pages = {555--558},
     publisher = {mathdoc},
     volume = {178},
     year = {1981},
     zbl = {0465.53030},
     url = {http://geodesic.mathdoc.fr/item/MZ_1981__178_173122/}
}