1. a1 [n. d.]. Additional material: code files for the specifications. https://github.com/sbaloglu/eev-codes
2. a2 [n. d.]. Statistics about internet voting in Estonia. https://www.valimised.ee/en/archive/statistics-about-internet-voting-estonia
3. a3 [n. d.]. Estonian online voting system. https://github.com/valimised/ivxv https://github.com/valimised/ivxv.
4. a4 [n. d.]. Helios - Verifiable Online Elections. https://heliosvoting.org/ https://heliosvoting.org/.
5. a5 [n. d.]. Belenios - Verifiable Online Voting System. https://belenios.org/ https://belenios.org/.