To cite ubiquity in publications use:

Harrold J, Abraham A (2014). “Ubiquity: a framework for physiological/mechanism-based pharmacokinetic/pharmacodynamic model development and deployment.” Journal of Pharmacokinetics and Pharmacodynamics, 41(2), 141-151. https://doi.org/10.1007/s10928-014-9352-6.

Corresponding BibTeX entry:

  @Article{,
    title = {Ubiquity: a framework for physiological/mechanism-based
      pharmacokinetic/pharmacodynamic model development and
      deployment},
    author = {J.M. Harrold and A.K. Abraham},
    journal = {Journal of Pharmacokinetics and Pharmacodynamics},
    year = {2014},
    volume = {41},
    number = {2},
    pages = {141-151},
    url = {https://doi.org/10.1007/s10928-014-9352-6},
  }