@article{MZM_1999_65_5_a0,
     author = {A. G. Vitushkin},
     title = {A~criterion for the representability of a~chain of $\sigma$-processes by a~composition of triangular chains},
     journal = {Matemati\v{c}eskie zametki},
     pages = {643--653},
     publisher = {mathdoc},
     volume = {65},
     number = {5},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1999_65_5_a0/}
}