@article{CMH_1972__47_139522,
     author = {Hans Martin Reimann},
     title = {Harmonische {Funktionen} und {Jacobi-} {Determinanten} von {Diffeomorphismen}},
     journal = {Commentarii mathematici Helvetici},
     pages = {397--408},
     year = {1972},
     volume = {47},
     zbl = {0249.57016},
     url = {http://geodesic.mathdoc.fr/item/CMH_1972__47_139522/}
}