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• Aberystwyth University Repository - Reino Unido (2)
• Acceda, el repositorio institucional de la Universidad de Las Palmas de Gran Canaria. España (1)
• Adam Mickiewicz University Repository (1)
• AMS Tesi di Laurea - Alm@DL - Università di Bologna (2)
• Applied Math and Science Education Repository - Washington - USA (1)
• ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (1)
• Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (2)
• Aston University Research Archive (15)
• Biodiversity Heritage Library, United States (1)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (6)
• Brock University, Canada (2)
• Bulgarian Digital Mathematics Library at IMI-BAS (2)
• Cambridge University Engineering Department Publications Database (2)
• CentAUR: Central Archive University of Reading - UK (11)
• Center for Jewish History Digital Collections (1)
• Deakin Research Online - Australia (12)
• Digital Commons at Florida International University (1)
• DigitalCommons@University of Nebraska - Lincoln (1)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (6)
• Duke University (1)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (2)
• Greenwich Academic Literature Archive - UK (1)
• Helda - Digital Repository of University of Helsinki (12)
• Indian Institute of Science - Bangalore - Índia (36)
• Instituto Politécnico do Porto, Portugal (1)
• Ministerio de Cultura, Spain (17)
• National Center for Biotechnology Information - NCBI (2)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (20)
• Queensland University of Technology - ePrints Archive (38)
• Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (5)
• Universidad Autónoma de Nuevo León, Mexico (4)
• Universidad Politécnica de Madrid (7)
• Universitat de Girona, Spain (1)
• Université de Montréal, Canada (1)
• University of Michigan (759)
• University of Queensland eSpace - Australia (3)
• University of Southampton, United Kingdom (1)
• University of Washington (1)