@article{MZM_2005_78_4_a1,
     author = {V. I. Danchenko},
     title = {Existence {Criterion} for {Estimates} of {Derivatives} of {Rational} {Functions}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {493--502},
     publisher = {mathdoc},
     volume = {78},
     number = {4},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2005_78_4_a1/}
}