1. Github: namecoin repository. https://github.com/namecoin/namecoin. Github: namecoin repository. https://github.com/namecoin/namecoin.
2. rcynic software. http://trac.rpki.net. rcynic software. http://trac.rpki.net.
3. RIPE RIS raw data. http://www.ripe.net/data-tools/stats/ris/ris-raw-data. RIPE RIS raw data. http://www.ripe.net/data-tools/stats/ris/ris-raw-data.
4. Rpki spider. http://rpkispider.verisignlabs.com/. Rpki spider. http://rpkispider.verisignlabs.com/.
5. University of oregon route views project. http://www.routeviews.org/. University of oregon route views project. http://www.routeviews.org/.