To cite package ‘invgamstochvol’ in publications use:

  Gonzalez L, Majoni B (2023). _invgamstochvol: Obtains the Log
  Likelihood for an Inverse Gamma Stochastic Volatility Model_. R
  package version 1.0.0,
  <https://CRAN.R-project.org/package=invgamstochvol>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {invgamstochvol: Obtains the Log Likelihood for an Inverse Gamma Stochastic
Volatility Model},
    author = {Leon Gonzalez and Blessings Majoni},
    year = {2023},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=invgamstochvol},
  }