@article{MZ_1966__94_170617,
     author = {Peter Lappan},
     title = {Asymptotic {Values} of {Normal} {Harmonic} {Functions.}},
     journal = {Mathematische Zeitschrift},
     pages = {152--156},
     publisher = {mathdoc},
     volume = {94},
     year = {1966},
     zbl = {0163.14003},
     url = {http://geodesic.mathdoc.fr/item/MZ_1966__94_170617/}
}