Richard Hoshino, Ken-ichi Kawarabayashi. The edge density of critical digraphs. Combinatorica, 35(5):619-631, 2015. [doi]
@article{HoshinoK15,
title = {The edge density of critical digraphs},
author = {Richard Hoshino and Ken-ichi Kawarabayashi},
year = {2015},
doi = {10.1007/s00493-014-2862-4},
url = {http://dx.doi.org/10.1007/s00493-014-2862-4},
researchr = {https://researchr.org/publication/HoshinoK15},
cites = {0},
citedby = {0},
journal = {Combinatorica},
volume = {35},
number = {5},
pages = {619-631},
}