1. Value in Ethics and Economics;Anderson,1995
2. A estimaçao do valor ambiental do Parque Nacional do Iguaçu a través do método de custo de viagem;Arigoni;Pesquisa e Planejamento Economico,2000
3. Introducción a la Economía Ambiental;Azqueta,2002
4. A note on the economics of biological invasions;Barbier;Ecological Economics,2001
5. A theory of rational addiction;Becker;Journal of Political Economy,1988