@article{ZAA_1999__18_3_48381,
     author = {Rakotondratsimba, Y.},
     title = {A characterization of a two-weight inequality for discrete two-dimensional {Hardy} operators.},
     journal = {Zeitschrift f\"ur Analysis und ihre Anwendungen},
     pages = {557--568},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {1999},
     zbl = {0935.26006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZAA_1999__18_3_48381/}
}