@article{GDZPPN002201100,
title = {Commutants of unbounded derivations in C*-algebras.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {346},
year = {1984},
pages = {21-32},
zbl = {0516.46042},
url = {http://dml.mathdoc.fr/item/GDZPPN002201100}
}
Ota, Schoichi. Commutants of unbounded derivations in C*-algebras.. Journal für die reine und angewandte Mathematik, Tome 346 (1984) pp. 21-32. http://gdmltest.u-ga.fr/item/GDZPPN002201100/