1. Numerical inversion of a characteristic function;Davies;Biometrika,1973
2. Algorithm AS 155: The distribution of a linear combination of χ2 random variables;Davies;Journal of the Royal Statistical Society, Series C (Applied Statistics),1980
3. On diagnostic checking time series models with portmanteau test statistics based on generalized inverses and {2}-inverses;Duchesne;COMPSTAT 2008, Proceedings in Computational Statistics,2008
4. Algorithm AS 204: The distribution of a positive linear combination of χ2 random variables;Farebrother;Journal of the Royal Statistical Society, Series C (Applied Statistics),1984
5. Algorithm AS 256: The distribution of a quadratic form in normal variables;Farebrother;Journal of the Royal Statistical Society, Series C (Applied Statistics),1990