@article{10_37236_4798,
     author = {Leif K J{\o}rgensen},
     title = {Normally regular digraphs},
     journal = {The electronic journal of combinatorics},
     year = {2015},
     volume = {22},
     number = {4},
     doi = {10.37236/4798},
     zbl = {1323.05143},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/4798/}
}