Bibliografia

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Direcção Geral de Energia e Geologia, 2009, acesso: http://www.dgge.pt European Biodiesel Board, 2009, acesso: http://www.ebb-eu.org/ European Biofuels Technology Platform , 2007, acesso: http://www.biofuelstp.eu Statistical Review of World Energy 2009/BP, acesso: http://www.bp.com/statisticalreview Santino Di Berardino. Produção tratamento e utilização de Biogás. Santino Di Berardino, Técnicas para a gestão do Ambiente :