@article{IM_1984__77_143151,
     author = {Yukihiko Namikawa and Shigeru Mukai},
     title = {Automorphisms of {Enriques} surfaces which act trivially on the cohomology groups.},
     journal = {Inventiones mathematicae},
     pages = {383--398},
     publisher = {mathdoc},
     volume = {77},
     year = {1984},
     zbl = {0559.14038},
     url = {http://geodesic.mathdoc.fr/item/IM_1984__77_143151/}
}