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• Acceda, el repositorio institucional de la Universidad de Las Palmas de Gran Canaria. España (1)
• B-Digital - Universidade Fernando Pessoa - Portugal (1)
• Biodiversity Heritage Library, United States (15)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (11)
• Brock University, Canada (1)
• Bulgarian Digital Mathematics Library at IMI-BAS (1)
• CentAUR: Central Archive University of Reading - UK (13)
• CORA - Cork Open Research Archive - University College Cork - Ireland (9)
• Digital Commons @ DU | University of Denver Research (5)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (2)
• Glasgow Theses Service (1)
• Harvard University (3)
• Portal de Revistas Científicas Complutenses - Espanha (6)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (3)
• Repositorio Institucional Universidad EAFIT - Medelin - Colombia (1)
• South Carolina State Documents Depository (1)
• Universidad Autónoma de Nuevo León, Mexico (1)
• Universidad Politécnica de Madrid (1)
• Universidade Complutense de Madrid (1)
• Universitat de Girona, Spain (19)
• University of Michigan (480)
• University of Queensland eSpace - Australia (5)
• University of Washington (3)