@article{MAN_1974__207_162532,
     author = {C.M. Edwards},
     title = {Spectral {Theory} for {A} {(X).}},
     journal = {Mathematische Annalen},
     pages = {67--86},
     publisher = {mathdoc},
     volume = {207},
     year = {1974},
     zbl = {0254.46019},
     url = {http://geodesic.mathdoc.fr/item/MAN_1974__207_162532/}
}