@article{MZM_1984_35_1_a7,
     author = {A. P. Ponomarev},
     title = {Improved estimate of the convergence of alternating sums to an alternating {Pontryagin} integral},
     journal = {Matemati\v{c}eskie zametki},
     pages = {83--91},
     publisher = {mathdoc},
     volume = {35},
     number = {1},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1984_35_1_a7/}
}