@article{1102810153,
author = {Koskela, M.},
title = {A characterization of non-negative matrix operators on $l^{p}$ to $l^{q}$ with $\infty >p\geq q>1$.},
journal = {Pacific J. Math.},
volume = {79},
number = {2},
year = {1978},
pages = { 165-169},
language = {en},
url = {http://dml.mathdoc.fr/item/1102810153}
}
Koskela, M. A characterization of non-negative matrix operators on $l^{p}$ to $l^{q}$ with $\infty >p\geq q>1$.. Pacific J. Math., Tome 79 (1978) no. 2, pp. 165-169. http://gdmltest.u-ga.fr/item/1102810153/