@article{GT_2007_11_1_a4,
     author = {Hambleton, Ian and Korzeniewski, Andrew and Ranicki, Andrew},
     title = {The signature of a fibre bundle is multiplicative mod 4},
     journal = {Geometry & topology},
     pages = {251--314},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {2007},
     doi = {10.2140/gt.2007.11.251},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2007.11.251/}
}