@article{VMUMM_2005_1_a0,
     author = {P. A. Borodin and O. N. Kosukhin},
     title = {On approximation by the simplest fractions on the real axis},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {3--8},
     publisher = {mathdoc},
     number = {1},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2005_1_a0/}
}