Index Copernicus International (ICI)
The ICV Index Copernicus is a recognized scientific criterion for the quality of a scientific journal and recommended by the Ministry of Science and Higher Education of Poland as a criterion for evaluating the scientific results of researchers. ICV Index Copernicus is widely used in scientific organizations and public institutions in Poland and other countries of the European Union, as well as outside the EU.
Expert evaluation of scientific journals included in Index Copernicus is carried out by careful analysis of each published number. This analysis is based on the study of special scientometric parameters of the publication, including the so-called hard copy (full-text versions of the evaluated journals delivered to the Index Copernicus office). When evaluating and developing criteria for evaluating journals that are included in the index, specialists engaged in biometric analysis of publications, including an analysis of the contribution of a journal to the development of science and the scientific effectiveness of published studies, participate. Link
Google Scholar - is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. The Google Scholar index includes most peer-reviewed online journals of Europe and America's largest scholarly publishers, plus scholarly books and other non-peer reviewed journals. Link
National Library of Ukraine Vernadsky
National Library of Ukraine Vernadsky -biggest Library of Ukraine, Chief Scientific Information Center of State. Ranked among the top ten national libraries of the world. Link
Crossref (formerly styled CrossRef) is an official Digital Object Identifier (DOI) Registration Agency of the International DOI Foundation. It is run by the Publishers International Linking Association Inc. (PILA) and was launched in early 2000 as a cooperative effort among publishers to enable persistent cross-publisher citation linking in online academic journals.
Crossref is a not-for-profit association of about 2000 voting member publishers who represent 4300 societies and publishers, including both commercial and not-for-profit organizations. Crossref includes publishers with varied business models, including those with both open access and subscription policies. Crossref does not provide a database of fulltext scientific content. Rather, it facilitates the links between distributed content hosted at other sites.
Crossref interlinks millions of items from a variety of content types, including journals, books, conference proceedings, working papers, technical reports, and data sets. Linked content includes materials from Scientific, Technical and Medical (STM) and Social Sciences and Humanities (SSH) disciplines. The expense is paid for by Crossref Member publishers. Crossref provides the technical and business infrastructure to provide for this reference linking using Digital Object Identifiers (DOIs). Crossref provides deposit and query service for its DOIs. Link
Bielefeld Academic Search Engine (BASE) is one of the world's most voluminous multi-disciplinary search engines especially for academic open access web resources. This engine collects, normalises, and indexes data using the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH). BASE provides more than 70 million documents from more than 3,000 sources. Where available, bibliographic data is provided, and the results may be sorted by multiple fields, such as by author, Dewey Decimal Classification or year of publication. Link
PKP Index is the project of Public Knowledge Project (PKP). The PKP Index is a database of articles, books, and conference proceedings using PKP's free, open source Open Journal Systems, Open Monograph Press, and Open Conference Systems software applications. The PKP Index includes more than 322000 records indexed from 1000 publications. The Index covers all subject areas and includes content from publishers from around the world. To be accepted into the Index, your journal, press, or conference site must include at least one article, chapter, or proceeding. The index is a curated list of publications and all submissions are reviewed and approved by PKP staff. The PKP Index is powered by PKP's own Open Harvester Systems. Link
WorldCat is a global union catalog and the world's largest bibliographic database that itemizes the collections of 72,000 libraries in 170 countries that participate in the Online Computer Library Center (OCLC) global cooperative. It contains more than 330 million records, representing over 2 billion physical and digital assets (articles, archival materials, books, journals, maps, music, videos, and other resources) in 485 languages. Link
ResearchBib - Academic Recource Index. Academic Recource Index — the product of ResearchBib. ResearchBib is open access with high standard indexing database for researchers and publishers. Research Bib may freely index journals, research papers, call for papers, research position. Journal Indexing. ResearchBib tries to cover all open access scientific and scholarly journals freely. The ResearchBib Journal Database is the largest complete journal database available on the internet freely. Journal Database try to cover all open access scientific and scholarly journals that use an appropriate quality control system, and it will not be limited to particular languages or subject areas. The Journal Database contains 420,000+ journals from different publishers, which includes the title, abbreviation, journal host url, index, publisher, description (aims and scope), online ISSN and print ISSN etc. Link