@article{MZM_2001_70_4_a6,
     author = {V. I. Danchenko and D. Ya. Danchenko},
     title = {Approximation by {Simplest} {Fractions}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {553--559},
     publisher = {mathdoc},
     volume = {70},
     number = {4},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2001_70_4_a6/}
}