@article{CMJ_2001__51_2_a5,
     author = {Riveros, M. S. and Torre, A. de la},
     title = {On the best ranges for $A^+_p$ and $RH_r^+$},
     journal = {Czechoslovak Mathematical Journal},
     pages = {285--301},
     publisher = {mathdoc},
     volume = {51},
     number = {2},
     year = {2001},
     mrnumber = {1844311},
     zbl = {0980.42015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2001__51_2_a5/}
}