@article{DMGT_2013__33_2_268178,
     author = {Richard H. Hammack},
     title = {Frucht{\textquoteright}s {Theorem} for the {Digraph} {Factorial}},
     journal = {Discussiones Mathematicae Graph Theory},
     pages = {329},
     publisher = {mathdoc},
     volume = {33},
     number = {2},
     year = {2013},
     zbl = {1292.05133},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/DMGT_2013__33_2_268178/}
}