@article{CC_2008_37_4_a4,
     author = {Barbu, Viorel and Prato, Giuseppe Da},
     title = {Some results for the reflection problems in {Hilbert} spaces},
     journal = {Control and Cybernetics},
     pages = {797--810},
     publisher = {mathdoc},
     volume = {37},
     number = {4},
     year = {2008},
     zbl = {1196.49006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CC_2008_37_4_a4/}
}