@article{GDZPPN002302942,
title = {A Lie Product Formula for One Parameter Groups of Isometries on Banach Spaces.},
journal = {Mathematische Annalen},
volume = {189},
year = {1970},
pages = {299-306},
zbl = {0184.16402},
url = {http://dml.mathdoc.fr/item/GDZPPN002302942}
}
GOLDSTEIN, J.A. A Lie Product Formula for One Parameter Groups of Isometries on Banach Spaces.. Mathematische Annalen, Tome 189 (1970) pp. 299-306. http://gdmltest.u-ga.fr/item/GDZPPN002302942/