To cite the nlreg package in publications use:

Alessandra R. B (2005). “hoa: An R package bundle for higher order likelihood inference.” The R Journal, 5/1 May, 20–27. ISSN 609-3631, https://journal.r-project.org/articles/RN-2005-004/RN-2005-004.pdf.

Examples of applications, and generally of the use of likelihood asymptotics, are given in: Brazzale, A.R., Davison, A.C. and Reid, N. (2007). Applied Asymptotics: Case Studies in Small-Sample Statistics. Cambridge University Press, Cambridge.

Corresponding BibTeX entry:

  @Article{Rnewspaper,
    author = {Brazzale {Alessandra R.}},
    title = {{hoa}: {An} {R} package bundle for higher order likelihood
      inference},
    journal = {The R Journal},
    volume = {5/1 {May}},
    year = {2005},
    pages = {20--27},
    note = {{ISSN} 609-3631},
    url =
      {https://journal.r-project.org/articles/RN-2005-004/RN-2005-004.pdf},
  }