.org/package=gclus" class="external-link uri">https://CRAN.R-project.org/package=gclus</a>
</li>
<li>Inselberg A., The Plane with Parallel Coordinates, The Visual Computer, 1(2), 69-91, 1985.</li>
<li>Kosara R., Bendix F., Hauser H., Parallel Sets: Interactive Exploration and Visual Analysis of Categorical Data, IEEE Transactions on Visualization and Computer Graphics, 12(4), 558-568, 2006.</li>
<li>Schloerke B., Crowley J., Cook D., Briatte F., Marbach M., Thoen E., Elberg ., Larmarange J.: GGally: Extensi