@article{MOMA_1980__90_177994,
     author = {Franz Langmayr},
     title = {On {Dirichlet's} {Approximation} {Theorem.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {229--232},
     publisher = {mathdoc},
     volume = {90},
     year = {1980},
     zbl = {0433.10022},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1980__90_177994/}
}