@article{BallGeyerSchulz2017,
    author = {Ball, Fabian and Geyer-Schulz, Andreas},
    title = {Weak Invariants of Actions of the Automorphism Group of a Graph },
    year = {2017},
    journal = {Archives of Data Science, Series A},
    volume = {2},
    number = {1},
    pages = {123-144},
    doi = {10.5445/KSP/1000058749/02}
}