To cite package mixAK in publications use:

Arnošt Komárek, Lenka Komárková (2014). Capabilities of R Package mixAK for Clustering Based on Multivariate Continuous and Discrete Longitudinal Data. Journal of Statistical Software, 59(12), 1--38. URL http://www.jstatsoft.org/v59/i12/.

Arnošt Komárek (2009). A New R package for Bayesian Estimation of Multivariate Normal Mixtures Allowing for Selection of Number of Components and Interval-Censored Data. Computational Statistics & Data Analysis, 53(12), 3932--3947. doi:10.1016/j.csda.2009.05.006.

Corresponding BibTeX entries:

  @Article{,
    title = {Capabilities of {R} Package {mixAK} for Clustering Based
      on Multivariate Continuous and Discrete Longitudinal Data},
    author = {Arno\v{s}t Kom\'arek and Lenka Kom\'arkov\'a},
    journal = {Journal of Statistical Software},
    year = {2014},
    volume = {59},
    number = {12},
    pages = {1--38},
    url = {http://www.jstatsoft.org/v59/i12/},
  }

  @Article{,
    title = {A New {R} Package for {B}ayesian Estimation of
      Multivariate Normal Mixtures Allowing for Selection of the Number
      of Components and Interval-Censored Data},
    author = {Arno\v{s}t Kom\'arek},
    journal = {Computational Statistics \& Data Analysis},
    year = {2009},
    volume = {53},
    number = {12},
    pages = {3932--3947},
    doi = {10.1016/j.csda.2009.05.006},
  }