@article{GDZPPN002292017,
title = {Problems in Linked Operators. I.},
journal = {Mathematische Annalen},
volume = {152},
year = {1963},
pages = {272-282},
zbl = {0123.31103},
url = {http://dml.mathdoc.fr/item/GDZPPN002292017}
}
CARROLL, R. Problems in Linked Operators. I.. Mathematische Annalen, Tome 152 (1963) pp. 272-282. http://gdmltest.u-ga.fr/item/GDZPPN002292017/