@article{MZ_1980__173_172968,
     author = {Hans Michael M\"oller},
     title = {Linear abh\"angige {Punktfunktionale} bei zweidimensionalen {Interpolations-} und {Approximationsproblemen.}},
     journal = {Mathematische Zeitschrift},
     pages = {35--50},
     publisher = {mathdoc},
     volume = {173},
     year = {1980},
     zbl = {0422.41003},
     url = {http://geodesic.mathdoc.fr/item/MZ_1980__173_172968/}
}