@article{dmtcs:5140,
    title      = {On the Complexity of Digraph Colourings and Vertex Arboricity},
    author     = {Winfried Hochstättler and Felix Schröder and Raphael Steiner},
    url        = {https://dmtcs.episciences.org/5140},
    doi        = {10.23638/DMTCS-22-1-4},
    journal    = {Discrete Mathematics \& Theoretical Computer Science},
    issn       = {1365-8050},
    volume     = {vol. 22 no. 1},
    issuetitle = {Graph Theory},
    eid        = 4,
    year       = {2020},
    month      = {Jan},
    keywords   = {Mathematics - Combinatorics},
}