@article{MZM_1974_16_4_a17,
     author = {A. Yu. Petrovich},
     title = {Convergence of sequences of {Riemann} sums},
     journal = {Matemati\v{c}eskie zametki},
     pages = {645--656},
     publisher = {mathdoc},
     volume = {16},
     number = {4},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_16_4_a17/}
}