To cite `portes' in publications use:

Mahdi, E. and McLeod, A. I. (2012). Improved multivariate portmanteau diagnostic test. Journal of Time Series Analysis 33/2, 211-222 URL http://onlinelibrary.wiley.com/doi/10.1111/j.1467-9892.2011.00752.x/abstract

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 =
      {http://onlinelibrary.wiley.com/doi/10.1111/j.1467-9892.2011.00752.x/abstract},
  }