To cite Xpose in publications, use:

Jonsson, E.N. & Karlsson, M.O. (1999) Xpose--an S-PLUS based population pharmacokinetic/pharmacodynamic model building aid for NONMEM. Computer Methods and Programs in Biomedicine. 58(1):51-64.

Corresponding BibTeX entry:

  @Article{,
    title = {Xpose--an S-PLUS based population
      pharmacokinetic/pharmacodynamic model building aid for NONMEM},
    journal = {Computer Methods and Programs in Biomedicine},
    volume = {58},
    number = {1},
    pages = {51-64},
    year = {1999},
    author = {E. N. Jonsson and M. O. Karlsson},
  }