To cite package mvtnorm in publications use

Genz A, Bretz F, Miwa T, Mi X, Leisch F, Scheipl F, Hothorn T (2020). mvtnorm: Multivariate Normal and t Distributions. R package version 1.1-1, https://CRAN.R-project.org/package=mvtnorm.

Genz A, Bretz F (2009). Computation of Multivariate Normal and t Probabilities, series Lecture Notes in Statistics. Springer-Verlag, Heidelberg. ISBN 978-3-642-01688-2.

Corresponding BibTeX entries:

  @Manual{,
    title = {{mvtnorm}: Multivariate Normal and t Distributions},
    author = {Alan Genz and Frank Bretz and Tetsuhisa Miwa and Xuefei
      Mi and Friedrich Leisch and Fabian Scheipl and Torsten Hothorn},
    year = {2020},
    note = {R package version 1.1-1},
    url = {https://CRAN.R-project.org/package=mvtnorm},
  }

  @Book{,
    title = {Computation of Multivariate Normal and t Probabilities},
    author = {Alan Genz and Frank Bretz},
    series = {Lecture Notes in Statistics},
    year = {2009},
    publisher = {Springer-Verlag},
    address = {Heidelberg},
    isbn = {978-3-642-01688-2},
  }