@article{SM_2002_193_9_a1,
     author = {M. I. Dyachenko and K. S. Kazarian},
     title = {On sets of convergence and divergence of multiple orthogonal series},
     journal = {Sbornik. Mathematics},
     pages = {1281--1301},
     year = {2002},
     volume = {193},
     number = {9},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2002_193_9_a1/}
}