@article{IM2_1992_39_3_a1,
     author = {M. I. Dyachenko},
     title = {Piecewise monotonic functions of several variables and a theorem of {Hardy} and {Littlewood}},
     journal = {Izvestiya. Mathematics },
     pages = {1113--1128},
     publisher = {mathdoc},
     volume = {39},
     number = {3},
     year = {1992},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1992_39_3_a1/}
}