1. http://www.hausarbeiten.de/faecher/vorschau/2594.html "Technische und rechtliche Aspekte der digitalen Signatur" Diplomarbeit 2002. Technische Universität München
    link to: http://users.pandora.be/nicvroom/deterministic_de.htm Near footnote 34.
  2. http://alexandria.tue.nl/extra2/redes/carmeliet2003.pdfTU/e rede Prof.dr. J.Carmeliet
    link to: http://users.pandora.be/nicvroom/underst_nl.htm
  3. http://museumvictoria.com.au/pages/7573/the-stars-student-activities-1-10.pdf
    link to: http://users.pandora.be/nicvroom/progrm12.htm
  4. http://museumvictoria.com.au/pages/7573/the-stars-student-activities-11-20.pdf
    link to: http://users.pandora.be/nicvroom/progrm12.htm
  5. http://citeseerx.ist.psu.edu/viewdoc/download
  6. http://www.ualberta.ca/~csamuel/DoesNotCompute.doc
    http://users.pandora.be/nicvroom/shor.htm
  7. http://www.yatedo.fr/search/web?q=Heleen+de+Graaf&rlg=fr&uid=03b935ca355525b93350d8a9def02437&c=normal&start=30&p=4 Heleen de Graaf
    Link naar: http://users.pandora.be/nicvroom/bank_lit_nl.htm
  8. http://website-tools.net/google-keyword/word/chaos+theory+wiki Rating 6-10
    Link to http://users.pandora.be/nicvroom/bank_lit_nl.htm