To cite GPareto in publications use:

Binois M, Picheny V (2019). “GPareto: An R Package for Gaussian-Process-Based Multi-Objective Optimization and Analysis.” Journal of Statistical Software, 89(8), 1–30. doi:10.18637/jss.v089.i08.

Corresponding BibTeX entry:

  @Article{,
    title = {{GPareto}: An {R} Package for Gaussian-Process-Based
      Multi-Objective Optimization and Analysis},
    author = {Micka\"el Binois and Victor Picheny},
    journal = {Journal of Statistical Software},
    year = {2019},
    volume = {89},
    number = {8},
    pages = {1--30},
    doi = {10.18637/jss.v089.i08},
  }