@article{PORMA_1999__56_3_48661,
     author = {Boulanger, C. and Schlitz, J.},
     title = {Nonlinear filtering with an infinite dimensional signal process.},
     journal = {Portugaliae mathematica},
     pages = {345--359},
     publisher = {mathdoc},
     volume = {56},
     number = {3},
     year = {1999},
     zbl = {0956.60075},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1999__56_3_48661/}
}