When using TagPies please cite:
Jänicke, S., Blumenstein, J., Rücker, M., Zeckzer, D., & Scheuermann, G. (2018). TagPies: Comparative Visualization of Textual Data. In VISIGRAPP (3: IVAPP) (pp. 40-51). PDF-preprint
Maximum Number of Tags: Stopword list: