@article{1178229155,
author = {G\"orlich, Ernst and Pontzen, Dieter},
title = {Approximation of operator semigroups of Oharu's class $(C\_{(k)})$},
journal = {Tohoku Math. J. (2)},
volume = {34},
number = {4},
year = {1982},
pages = { 539-552},
language = {en},
url = {http://dml.mathdoc.fr/item/1178229155}
}
Görlich, Ernst; Pontzen, Dieter. Approximation of operator semigroups of Oharu's class $(C_{(k)})$. Tohoku Math. J. (2), Tome 34 (1982) no. 4, pp. 539-552. http://gdmltest.u-ga.fr/item/1178229155/