@article{SM_2011_202_9_a3,
     author = {T. S. Mardvilko and A. A. Pekarskii},
     title = {Direct and inverse theorems of rational approximation in the {Bergman} space},
     journal = {Sbornik. Mathematics},
     pages = {1327--1346},
     publisher = {mathdoc},
     volume = {202},
     number = {9},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2011_202_9_a3/}
}