@article{GDZPPN002201062,
title = {Decomposition of unbounded derivations into invariant and approximately inner parts.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {346},
year = {1984},
pages = {166-193},
zbl = {0515.46057},
url = {http://dml.mathdoc.fr/item/GDZPPN002201062}
}
Bratteli, O.; Elliott, G. A.; Jorgensen, P. E. T. Decomposition of unbounded derivations into invariant and approximately inner parts.. Journal für die reine und angewandte Mathematik, Tome 346 (1984) pp. 166-193. http://gdmltest.u-ga.fr/item/GDZPPN002201062/