Premium research papers are typically hosted on platforms or databases that require a subscription or purchase to access.

Here are some trusted sources where you can find premium research papers:

Academic Publishers and Databases

1. Elsevier’s ScienceDirect

   • A leading platform for accessing premium peer-reviewed research in various disciplines.
   • Website: https://www.sciencedirect.com/

2. SpringerLink

   • Offers access to journals, books, and conference papers in science, technology, and medicine.
   • Website: https://link.springer.com/

3. Wiley Online Library

   • Publishes premium articles in multiple disciplines, including life sciences, physical sciences, and social sciences.
   • Website: https://onlinelibrary.wiley.com/

4. Taylor & Francis Online

   • Hosts scholarly journals in a wide range of subjects, from health sciences to humanities.
   • Website: https://www.tandfonline.com/

5. Cambridge University Press

   • Provides access to journals and books across various disciplines.
   • Website: https://www.cambridge.org/core

6. Oxford Academic (Oxford University Press)

   • Publishes high-quality research papers in various academic disciplines.
   • Website: https://academic.oup.com/

Specialized Platforms

1. JSTOR

   • Archives academic journal articles, books, and primary sources across many fields.
   • Website: https://www.jstor.org/

2. IEEE Xplore

   • Offers access to technical literature in engineering, computer science, and related fields.
   • Website: https://ieeexplore.ieee.org/

3. ACM Digital Library

   • Focuses on computing and IT-related research.
   • Website: https://dl.acm.org/

4. SAGE Journals

   • Publishes articles in health sciences, social sciences, and humanities.
   • Website: https://journals.sagepub.com/

5. ProQuest

   • A database offering access to journals, dissertations, and other scholarly content.
   • Website: https://www.proquest.com/

Pay-Per-View Options

1. ResearchGate

   • Some papers are shared by authors themselves and may include premium content.
   • Website: https://www.researchgate.net/

2. OpenAthens-Linked Access

   • Many libraries use OpenAthens to provide institutional access to premium content.

How to Access Premium Papers for Free (When Possible)

1. Institutional Access

   • Universities or workplaces may provide free access to premium content through their library systems.

2. Author’s Copy

   • Contact the authors directly via platforms like ResearchGate or email; many are happy to share copies.

3. Public Access Initiatives

   • Check repositories like PubMed Central or initiatives like Unpaywall (https://unpaywall.org/) that link to free versions of premium papers.

By leveraging these sources, you can find and access high-quality research papers, whether by subscribing, purchasing, or seeking institutional or public access.