@article{IM_1987__87_143430,
     author = {R.J. Stern and R. Fintushel},
     title = {O(2) action on the 5-sphere.},
     journal = {Inventiones mathematicae},
     pages = {457--476},
     publisher = {mathdoc},
     volume = {87},
     year = {1987},
     zbl = {0613.57018},
     url = {http://geodesic.mathdoc.fr/item/IM_1987__87_143430/}
}