@article{CMH_1991__66_4_140222,
     author = {P.J. Webb},
     title = {A split exact sequence of {Mackey} functors.},
     journal = {Commentarii mathematici Helvetici},
     pages = {34--69},
     publisher = {mathdoc},
     volume = {66},
     number = {4},
     year = {1991},
     zbl = {0722.57019},
     url = {http://geodesic.mathdoc.fr/item/CMH_1991__66_4_140222/}
}