@article{10_4064_aa151_1_5,
     author = {Stephen Harrap},
     title = {Twisted inhomogeneous {Diophantine} approximation
 and badly approximable sets},
     journal = {Acta Arithmetica},
     pages = {55--82},
     publisher = {mathdoc},
     volume = {151},
     number = {1},
     year = {2012},
     doi = {10.4064/aa151-1-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa151-1-5/}
}