New representations of the noncentral chi-square density and cumulative
Youn-Min Chou, Kathleen H. Arthur, Rebecca B. Rosenstein, D. B. Owen · Communication in Statistics- Theory and Methods · 1984
Representations of noncentral chi-square cumulative distribution function and probability density function are reviewed and new repre¬sentations are given. One representation of the cdf in terms of an integral is easily computed on any machine which has an accurate algorithm for computing the normal cdf.