1. http://news.reseau-concept.net/images/oiv_es/Client/Communique_Stats_Tbilissi_ES.pdf
2. http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=CELEX:31968L0193:ES:NOT
3. http://www.europarl.europa.eu/meetdocs/2009_2014/documents/com/com_com%282010%290359_/com_com%282010%290359_en.pdf
4. http://www.legislation.nsw.gov.au/sessionalview/sessional/act/1901-14.pdf