@article{MZM_2006_79_2_a0,
     author = {M. O. Avdeeva and V. A. Bykovskii},
     title = {Refinement of {Vahlen's} {Theorem} for {Minkowski} {Bases} of {Three-Dimensional} {Lattices}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {163--168},
     publisher = {mathdoc},
     volume = {79},
     number = {2},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2006_79_2_a0/}
}