"Jön az internenetadó (sic)" [Here's the internet tax]. Investor.hu (in Hungarian). October 21, 2014. Archived from the original on September 24, 2015. Retrieved October 29, 2014.
Kroes, Neelie (22 October 2014). "Twitter". Retrieved 28 May 2015.
web.archive.org
"Jön az internenetadó (sic)" [Here's the internet tax]. Investor.hu (in Hungarian). October 21, 2014. Archived from the original on September 24, 2015. Retrieved October 29, 2014.