1. Amphora Encyclopaedia Britannica 2010 http://www.britannica.com/EBchecked/topic/21654/amphora
2. WHO Collaborative Project on Identification and Management of Alcohol-Related Problems in Primary Health Care Phase IV Report http://www.who.int/substance_abuse/publications/identification_management_alcoholproblems_phaseiv.pdf
3. PHEPA - Primary Health Care European Project on Alcohol http://www.gencat.cat/salut/phepa/units/phepa/html/en/Du9/index.html ® http://www.webcitation.org/5vMSxDgU2