@article{DMTCS_2015_17_2_a5,
     author = {Sano, Yoshio and Park, Jeongmi},
     title = {The double competition multigraph of a digraph},
     journal = {Discrete mathematics & theoretical computer science},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {2015-2016},
     doi = {10.46298/dmtcs.2133},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.46298/dmtcs.2133/}
}