@article{MAN_1981__257_163554,
     author = {Sch\^oichi \^Ota},
     title = {Closed {Derivations} in {C*-Algebras.}},
     journal = {Mathematische Annalen},
     pages = {239--250},
     publisher = {mathdoc},
     volume = {257},
     year = {1981},
     zbl = {0449.46053},
     url = {http://geodesic.mathdoc.fr/item/MAN_1981__257_163554/}
}