@article{MZ_1981__178_173108,
     author = {Volker Kasten and Gerald Schieder},
     title = {Zur {Approximation} auf d\"unnen {Mengen} im {C2.}},
     journal = {Mathematische Zeitschrift},
     pages = {375--380},
     publisher = {mathdoc},
     volume = {178},
     year = {1981},
     zbl = {0451.32010},
     url = {http://geodesic.mathdoc.fr/item/MZ_1981__178_173108/}
}