@article{MOMA_1972__76_177588,
     author = {M. Marcus and William R. Gordon},
     title = {On {Projections} in the {Symmetric} {Power} {Space.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {130--134},
     publisher = {mathdoc},
     volume = {76},
     year = {1972},
     zbl = {0243.15026},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1972__76_177588/}
}