@article{MZ_1968__106_171036,
     author = {R.P. Burn},
     title = {The {Uniqueness} of the {Harmonic} {Construction.}},
     journal = {Mathematische Zeitschrift},
     pages = {332--336},
     publisher = {mathdoc},
     volume = {106},
     year = {1968},
     zbl = {0162.24301},
     url = {http://geodesic.mathdoc.fr/item/MZ_1968__106_171036/}
}