1. Costa C, Almeida J (2007) Reputation systems for fighting pollution in peer-to-peer file sharing systems. In: Seventh IEEE international conference on peer-to-peer computing (P2P 2007), 2 Sept 2007, pp 53–60
2. Liang J, Kumar R, Xi Y, Ross K (2005) Pollution in P2P file sharing systems. In: INFOCOM 2005, 24th annual joint conference of the IEEE computer and communications societies. Proceedings IEEE, vol 2. 15 March 2005, pp 1174–1185
3. Rowaihy H, Enck W, McDaniel P, La Porta T (2005) Limiting sybil attacks in structured P2P networks. Pennsylvania State University, State College, Pennsylvania
4. Schlingensiepen J (2008) Korporative IT-Systemarchitektur zur Unterstützung unternehmensübergreifender kooperativer Produktentwicklung. Otto-von-Guericke-Universität Magdeburg, Magdeburg
5. The European Parliament and the Council of the European Union (2010) Directive 2010/40/EU of the European parliament and of the council of 7 July 2010 on the framework for the deployment of intelligent transport systems in the field of road transport and for interfaces with other modes of transport.
http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=CELEX:32010L0040:EN:NOT
. Accessed 12 May 2013