@article{MOMA_1968__72_177428,
     author = {J\"org M. Wills},
     title = {Zur simultanen homogenen diophantischen {Approximation} {I.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {254--263},
     publisher = {mathdoc},
     volume = {72},
     year = {1968},
     zbl = {0188.10602},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1968__72_177428/}
}