@article{CMUC_1996_37_3_a2,
     author = {W\'ojcik, Piotr},
     title = {On automorphisms of digraphs without symmetric cycles},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {457--467},
     year = {1996},
     volume = {37},
     number = {3},
     mrnumber = {1426910},
     zbl = {0881.05051},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1996_37_3_a2/}
}