To cite package ‘flexmixNL’ in publications use:

  Omerovic S (2019). _flexmixNL: Finite Mixture Modeling of Generalized
  Nonlinear Models_. R package version 0.0.1,
  <https://CRAN.R-project.org/package=flexmixNL>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {flexmixNL: Finite Mixture Modeling of Generalized Nonlinear Models},
    author = {Sanela Omerovic},
    year = {2019},
    note = {R package version 0.0.1},
    url = {https://CRAN.R-project.org/package=flexmixNL},
  }