@article{MZ_1979__168_172863,
     author = {Robert W. Switzer},
     title = {Postnikov {Towers} {Associated} with {Complex} {2-Plane} and {Symplectic} {Line} {Bundles.}},
     journal = {Mathematische Zeitschrift},
     pages = {87--104},
     publisher = {mathdoc},
     volume = {168},
     year = {1979},
     zbl = {0395.55007},
     url = {http://geodesic.mathdoc.fr/item/MZ_1979__168_172863/}
}