To cite PSPManalysis in publications use:

de Roos AM (2018). PSPManalysis: A Software Package for Numerical Analysis of Physiologically Structured Population Models. Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam. https://bitbucket.org/amderoos/PSPManalysis.

Corresponding BibTeX entry:

  @Manual{,
    title = {PSPManalysis: A Software Package for Numerical Analysis of
      Physiologically Structured Population Models},
    author = {Andre M. {de Roos}},
    organization = {Institute for Biodiversity and Ecosystem Dynamics,
      University of Amsterdam},
    year = {2018},
    url = {https://bitbucket.org/amderoos/PSPManalysis},
  }