@article{00750686,
title = {Adjoints of solution semigroups and identifiability of delay differential equations in Hilbert spaces.},
journal = {Acta Mathematica Universitatis Comenianae. New Series},
volume = {63},
year = {1994},
pages = {193-206},
zbl = {0822.34053},
language = {en},
url = {http://dml.mathdoc.fr/item/00750686}
}
Mastinšek, M. Adjoints of solution semigroups and identifiability of delay differential equations in Hilbert spaces.. Acta Mathematica Universitatis Comenianae. New Series, Tome 63 (1994) pp. 193-206. http://gdmltest.u-ga.fr/item/00750686/