@article{DAN_1964_156_2_a4,
     author = {B. A. Kushner},
     title = {Riemann integration in constructive analysis},
     journal = {Doklady Akademii Nauk},
     pages = {255--257},
     publisher = {mathdoc},
     volume = {156},
     number = {2},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_156_2_a4/}
}