@article{JRAM_1987__0375_0376_152905,
     author = {C.T.C. Wall},
     title = {Real forms of smooth del {Pezzo} surfaces.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {47--66},
     publisher = {mathdoc},
     volume = {0375_0376},
     year = {1987},
     zbl = {0628.14023},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1987__0375_0376_152905/}
}