Search the National Defense Academy repository for academic publications and research outputs from the university.
Helios Repository
Search the Helios repository for open-access scientific publications and research content from the National Hellenic Research Foundation.
About Helios Repository
Helios is the digital repository for the scientific work of the National Hellenic Research Foundation. It provides open online access to its digital collections, with search and browsing by institute community, subject, publication type, and researcher.
Coverage is limited to foundation-related output, and additional services require registration.
Key features
- Open access to National Hellenic Research Foundation scientific work
- Search across digital collections
- Browse by institute community collections
- Filter by subject category
- Filter by publication type
- Browse by NHRF researcher
Best for: Researchers, students, educators, and members of the public seeking open-access publications from the National Hellenic Research Foundation.
Good for
- Free open access to digital collections
- Browsing by community, subject, type, and researcher
- Built to follow international interoperability and open-access standards
Watch out for
- Coverage limited to National Hellenic Research Foundation work
- Additional services require registration
Helios Repository at a glance
- Website
- helios.eie.gr/helios
- Category
- Research & Data › Academic Search
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- Greek
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Helios Repository FAQ
Do I need to register to use Helios?
No for basic access. The collections have free open access; registration is needed only for additional services.
Which research units are represented?
Collections include the Institute of Historical Research, the Institute of Chemical Biology, the Institute of Theoretical and Physical Chemistry, and other institutional initiatives and datasets.
What types of materials are included?
Journal articles, lectures, books, book chapters, conference papers, presentations, events, and educational material.
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