@article{MAN_1979__244_163288,
     author = {A. Peyerimhoff and W. Kratz and W. Jurkat},
     title = {On {Best} {Two-Dimensional} {Dirichlet-Approximations} and their {Algorithmic} {Calculation.}},
     journal = {Mathematische Annalen},
     pages = {1--32},
     publisher = {mathdoc},
     volume = {244},
     year = {1979},
     zbl = {0413.10026},
     url = {http://geodesic.mathdoc.fr/item/MAN_1979__244_163288/}
}