@article{CHEB_2013_14_4_a3,
     author = {O. N. German},
     title = {Badly approximable matrices and {Diophantine} exponents},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {38--79},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2013_14_4_a3/}
}