@article{GDZPPN002549980,
title = {A representation formula for strongly continuous cosine families. (Short Communication).},
journal = {Aequationes mathematicae},
volume = {20},
year = {1980},
pages = {115-116},
zbl = {0467.47037},
url = {http://dml.mathdoc.fr/item/GDZPPN002549980}
}
Webb, G.F. A representation formula for strongly continuous cosine families. (Short Communication).. Aequationes mathematicae, Tome 20 (1980) pp. 115-116. http://gdmltest.u-ga.fr/item/GDZPPN002549980/