@article{01370377,
title = {Nonlinear filtering with an infinite dimensional signal process.},
journal = {Portugaliae Mathematica. Nova S\'erie},
volume = {56},
year = {1999},
pages = {345-359},
zbl = {0956.60075},
language = {en},
url = {http://dml.mathdoc.fr/item/01370377}
}
Boulanger, C.; Schlitz, J. Nonlinear filtering with an infinite dimensional signal process.. Portugaliae Mathematica. Nova Série, Tome 56 (1999) pp. 345-359. http://gdmltest.u-ga.fr/item/01370377/