To cite the CompQuadForm package in publications use:

Duchesne, P. and Lafaye De Micheaux, P. (2010) Computing the distribution of quadratic forms: Further comparisons between the Liu-Tang-Zhang approximation and exact methods Computational Statistics and Data Analysis vol. 54, p.858-862

Corresponding BibTeX entry:

  @Article{,
    title = {Computing the Distribution of Quadratic Forms: Further
      Comparisons Between the Liu-Tang-Zhang Approximation and Exact
      Methods},
    author = {Pierre Duchesne and Pierre {Lafaye De Micheaux}},
    journal = {Computational Statistics and Data Analysis},
    year = {2010},
    pages = {858-862},
    volume = {54},
  }