@article{MZ_1968__104_170948,
     author = {Gert Sabidussi},
     title = {Existence and {Structure} of {Self-Adjoint} {Graphs.}},
     journal = {Mathematische Zeitschrift},
     pages = {257--280},
     year = {1968},
     volume = {104},
     zbl = {0157.31003},
     url = {http://geodesic.mathdoc.fr/item/MZ_1968__104_170948/}
}