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• Queensland University of Technology - ePrints Archive (5)
• RCAAP - Repositório Científico de Acesso Aberto de Portugal (1)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (1)
• University of Southampton, United Kingdom (2)
• WestminsterResearch - UK (2)
• Worcester Research and Publications - Worcester Research and Publications - UK (1)