To cite `portes' in publications use:

Mahdi E, McLeod AI (2012). “Improved multivariate portmanteau diagnostic test.” Journal of Time Series Analysis, 33(2), 211–222. https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1467-9892.2011.00752.x.

Corresponding BibTeX entry:

  @Article{,
    title = {Improved multivariate portmanteau diagnostic test},
    author = {Esam Mahdi and A. I. McLeod},
    journal = {Journal of Time Series Analysis},
    year = {2012},
    volume = {33},
    number = {2},
    pages = {211--222},
    url =
      {https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1467-9892.2011.00752.x},
  }