@article{1256050817,
author = {Hopenwasser, Alan},
title = {On the norm of the sum of certain operators},
journal = {Illinois J. Math.},
volume = {19},
number = {4},
year = {1975},
pages = { 302-307},
language = {en},
url = {http://dml.mathdoc.fr/item/1256050817}
}
Hopenwasser, Alan. On the norm of the sum of certain operators. Illinois J. Math., Tome 19 (1975) no. 4, pp. 302-307. http://gdmltest.u-ga.fr/item/1256050817/