_k\)
  then \((Y_1, \ldots, Y_K) / S\) has a
  Dirichlet(\(\alpha_1\), ..., \(\alpha_K\)) distribution.</p>
<p>See
<a href="https://en.wikipedia.org/wiki/Dirichlet_distribution#Gamma_distribution" class="external-link">https://en.wikipedia.org/wiki/Dirichlet_distribution#Gamma_distribution</a></p>
    </div>
    <div id="references">
    <h2>References</h2>
    <p>Kotz, S., Balakrishnan, N. and Johnson, N. L. (2000)
  <em>Continuous Multivariate Distributions, vol. 1, Models and
  Applications, 2nd edn</em>