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• AMS Tesi di Laurea - Alm@DL - Università di Bologna (3)
• Aquatic Commons (3)
• DigitalCommons - The University of Maine Research (1)
• Portal de Revistas Científicas Complutenses - Espanha (1)
• Publishing Network for Geoscientific & Environmental Data (8)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (1)
• Universidad Autónoma de Nuevo León, Mexico (1)
• University of Michigan (4)