To cite mixdir in publications use:

  C. Ahlmann-Eltze and C. Yau, "MixDir: Scalable Bayesian Clustering
  for High-Dimensional Categorical Data", 2018 IEEE 5th International
  Conference on Data Science and Advanced Analytics (DSAA), Turin,
  Italy, 2018, pp. 526-539.

A BibTeX entry for LaTeX users is

  @InProceedings{,
    title = {{MixDir}: Scalable Bayesian Clustering for High-Dimensional Categorical Data},
    author = {Constantin Ahlmann-Eltze and Christopher Yau},
    booktitle = {2018 IEEE 5th International Conference on Data Science and Advanced Analytics (DSAA)},
    year = {2018},
    pages = {526--539},
    doi = {10.1109/DSAA.2018.00068},
    url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8631438&isnumber=8631391},
  }