@article{03616721,
title = {Convexity, boundedness, and almost periodicity for differential equations in Hilbert space.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {2},
year = {1979},
pages = {1-13},
doi = {10.1155/S0161171279000016},
zbl = {0397.34041},
language = {en},
url = {http://dml.mathdoc.fr/item/03616721}
}
Goldstein, Jerome A. Convexity, boundedness, and almost periodicity for differential equations in Hilbert space.. International Journal of Mathematics and Mathematical Sciences, Tome 2 (1979) pp. 1-13. doi : 10.1155/S0161171279000016. http://gdmltest.u-ga.fr/item/03616721/