@article{SM_2012_203_11_a1,
     author = {P. A. Borodin},
     title = {Approximation by simple partial fractions with constraints on the poles},
     journal = {Sbornik. Mathematics},
     pages = {1553--1570},
     publisher = {mathdoc},
     volume = {203},
     number = {11},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2012_203_11_a1/}
}