@article{MZ_1979__168_172858,
     author = {Tsuyoshi Ando and Fan Ky},
     title = {Pick-Julia {Theorems} for {Operators.}},
     journal = {Mathematische Zeitschrift},
     pages = {23--34},
     publisher = {mathdoc},
     volume = {168},
     year = {1979},
     zbl = {0389.47004},
     url = {http://geodesic.mathdoc.fr/item/MZ_1979__168_172858/}
}