@article{DAN_1965_165_6_a4,
     author = {B. A. Kushner},
     title = {On the constructive theory of the {Riemann} integral},
     journal = {Doklady Akademii Nauk},
     pages = {1238--1240},
     publisher = {mathdoc},
     volume = {165},
     number = {6},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_165_6_a4/}
}