To cite nopp in publications use:

Curini L and Iacus SM (2017). “Nash Optimal Party Positions: The nopp R Package.” Journal of Statistical Software, 81(11), pp. 1–25. doi: 10.18637/jss.v081.i11.

Corresponding BibTeX entry:

  @Article{,
    title = {Nash Optimal Party Positions: The {nopp} {R} Package},
    author = {Luigi Curini and Stefano M. Iacus},
    journal = {Journal of Statistical Software},
    year = {2017},
    volume = {81},
    number = {11},
    pages = {1--25},
    doi = {10.18637/jss.v081.i11},
  }