@article{GDZPPN002439638,
title = {The operator equation AX - XB = C with unbounded operators A and B and related abstract Cauchy problems.},
journal = {Mathematische Zeitschrift},
volume = {207},
year = {1991},
pages = {567-588},
zbl = {0726.47029},
url = {http://dml.mathdoc.fr/item/GDZPPN002439638}
}
Phóng, Vu Quoc. The operator equation AX - XB = C with unbounded operators A and B and related abstract Cauchy problems.. Mathematische Zeitschrift, Tome 207 (1991) pp. 567-588. http://gdmltest.u-ga.fr/item/GDZPPN002439638/