@article{SM_1988_59_2_a10,
     author = {V. K. Dzyadyk},
     title = {On the theory of special functions and their approximations},
     journal = {Sbornik. Mathematics},
     pages = {429--458},
     publisher = {mathdoc},
     volume = {59},
     number = {2},
     year = {1988},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1988_59_2_a10/}
}