@article{MZM_2011_90_4_a5,
     author = {S. F. Lukomskii},
     title = {Haar {System} on the {Product} of {Groups} of~$p${-Adic} {Integers}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {541--557},
     publisher = {mathdoc},
     volume = {90},
     number = {4},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2011_90_4_a5/}
}