@article{DAN_1967_176_4_a2,
     author = {Osvald Demuth},
     title = {A necessary and sufficient condition for the {Riemann} integrability of constructive functions},
     journal = {Doklady Akademii Nauk},
     pages = {757--758},
     publisher = {mathdoc},
     volume = {176},
     number = {4},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_176_4_a2/}
}