To cite ddalpha in publications use:

Lange, T., Mosler, K. and Mozharovskyi, P. (2014). Fast nonparametric classification based on data depth. Statistical Papers, 55, 49-69

Mozharovskyi, P. (2013), Contributions to Depth-based Classification and Computation of the Tukey Depth. Verlag Dr. Kovac, Hamburg

Corresponding BibTeX entries:

  @Article{,
    title = {Fast nonparametric classification based on data depth},
    author = {Tatjana Lange and Karl Mosler and Pavlo Mozharovskyi},
    journal = {Statistical Papers},
    year = {2014},
    volume = {55},
    number = {1},
    pages = {49-69},
  }
  @PhdThesis{,
    title = {Contributions to Depth-based Classification and
      Computation of the Tukey Depth},
    author = {Pavlo Mozharovskyi},
    publisher = {Verlag Dr. Kovac, Hamburg},
    year = {2015},
    school = {Universitaet zu Koeln},
  }