@article{AM2_1986__30_137129,
     author = {Rainer L\"owen},
     title = {Actions of {SO(3)} on 4-dimensional stable planes.},
     journal = {Aequationes mathematicae},
     pages = {212--222},
     publisher = {mathdoc},
     volume = {30},
     year = {1986},
     zbl = {0594.51015},
     url = {http://geodesic.mathdoc.fr/item/AM2_1986__30_137129/}
}