@article{CMUC_1990__31_4_a5,
     author = {Hamhalter, Jan},
     title = {Orthogonal vector measures on projection lattices in a {Hilbert} space},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {655--660},
     publisher = {mathdoc},
     volume = {31},
     number = {4},
     year = {1990},
     mrnumber = {1091363},
     zbl = {0743.46067},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1990__31_4_a5/}
}