TOXNET is a group of databases covering chemicals and drugs, environmental health, occupational safety and health as well as toxicology. Among them there is Toxline - the database for bibliographic search on toxicology matters. TOXNET is managed by the  National Library of Medicine (NLM).

It offers bibliographic search in the databases

• Science Citation Index Expanded (SCI-EXPANDED) --1970-present
• Social Sciences Citation Index (SSCI) --1970-present
• Arts & Humanities Citation Index (A&HCI) --1975-present
• Emerging Sources Citation Index (ESCI) --2015-present

Access to the abstracts and the citations of the articles are available.

Wiley Online Library is a platform created by that publisher, in order to provide peer-reviewed scholarly literature of all disciplines. It includes journals, books and reference works and access is possible to the subscriptions of the University of Crete, that exceed 6900 titles in total, as well as open access material.

Subject Coverage: Physical Sciences, Life Sciences, Health Sciences, Social Sciences and Humanities

Zenodo is an open access repository that provides access to research publications and data of various kinds (books, articles, dissertations, reports, images, videos etc), available for researcher that wish to publish their work. It was created in 2013 on behalf of the European Commission, by CERN and OPENaire european program, in order to serve open science.

Zentralblatt MATH (zbMATH) is a comprehensive, abstracting and reviewing service in pure and applied mathematics in the areas of natural sciences, computer science, economics and engineering. It also covers history and philosophy of mathematics and university education. It is produced by FIZ Karlsruhe and edited by the European Mathematical Society, FIZ Karlsruhe, and the Heidelberg Academy of Sciences and Humanities. The zbMATH database indexes more than 3.000 journals and serials and 170.000 books, conference proceedings etc. The coverage starts in the 18th century and is complete from 1868 to the present.