@article{DAN_1993_329_6_a10,
     author = {A. A. Bykov and V. Yu. Popov},
     title = {On the application of singular expansions with respect to a small},
     journal = {Doklady Akademii Nauk},
     pages = {726--728},
     publisher = {mathdoc},
     volume = {329},
     number = {6},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1993_329_6_a10/}
}