@article{DAN_1977_233_6_a13,
     author = {V. A. Shurygin},
     title = {On estimates of the complexity of algorithmic problems in constructive analysis},
     journal = {Doklady Akademii Nauk},
     pages = {1064--1067},
     publisher = {mathdoc},
     volume = {233},
     number = {6},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_233_6_a13/}
}