@article{10_4153_CJM_1998_038_x,
     author = {Carey, Alan and Phillips, John},
     title = {Unbounded {Fredholm} {Modules} and {Spectral} {Flow}},
     journal = {Canadian journal of mathematics},
     pages = {673--718},
     year = {1998},
     volume = {50},
     number = {4},
     doi = {10.4153/CJM-1998-038-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1998-038-x/}
}