@article{10_4153_CMB_1984_020_0,
     author = {Harary, Frank and Karabed, Razmik},
     title = {Regular {Digraphs} {Containing} a {Given} {Digraph}},
     journal = {Canadian mathematical bulletin},
     pages = {129--133},
     year = {1984},
     volume = {27},
     number = {2},
     doi = {10.4153/CMB-1984-020-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1984-020-0/}
}