@article{INTM_1971_8_a2,
     author = {B. I. Golubov},
     title = {Series in the {Haar} system},
     journal = {Itogi nauki i tehniki. Seri\^a, Matemati\v{c}eskij analiz},
     pages = {109--146},
     year = {1971},
     volume = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTM_1971_8_a2/}
}