A citation index is a kind of bibliographic index, an index of citations between publications, allowing the user to easily establish which later documents cite which earlier documents. A form of citation index is first found in 12th-century Hebrew religious literature. Legal citation indexes are found in the 18th century and were made popular by citators such as Shepard's Citations (1873). In 1961, Eugene Garfield's Institute for Scientific Information (ISI) introduced the first citation index for papers published in academic journals, first the Science Citation Index (SCI), and later the Social Sciences Citation Index (SSCI) and the Arts and Humanities Citation Index (AHCI). American Chemical Society converted its printed Chemical Abstract Service into internet-accessible SciFinder in 2008. The first automated citation indexing was done by CiteSeer in 1997 and was patented. Other sources for such data include Google Scholar, Microsoft Academic, Elsevier's Scopus, and the National Institutes of Health's iCite.
ScienceDirect is a searcheable web-based bibliographic database, which provides access to full texts of scientific and medical publications of the Dutch publisher Elsevier as well of several small academic publishers. It hosts over 18 million publons from more than 4,000 academic journals and 30,000 e-books. The access to the full-text requires subscription, while the bibliographic metadata are free to read. ScienceDirect was launched by Elsevier in March 1997.
Open Astronomy is a peer-reviewed fully open access scientific journal, and currently published by De Gruyter Open. The journal was established in 1992 by the Institute of Theoretical Physics and Astronomy as Baltic Astronomy, obtaining its current title in 2017 when it converted to open access. The journal is devoted to publishing research, reviews and news spanning all aspects of astronomy and astrophysics. The editor in chief is Prof. Beatriz Barbuy.
Walter de Gruyter GmbH, known as De Gruyter, is a German scholarly publishing house specializing in academic literature.
The International Journal of Environmental Research and Public Health is a peer-reviewed open access scientific journal that was established in 2004 and is published by MDPI. The editor-in-chief is Paul B. Tchounwou. The journal covers all aspects of environmental health sciences and public health.
Open Life Sciences is a peer-reviewed open access scientific journal covering all areas of the life sciences. It was established in 2006 as the Central European Journal of Biology and co-published by Versita and Springer Science+Business Media. It obtained its current title in 2014 when it was moved completely to the De Gruyter imprint, at the same time switching to full open access. The editor-in-chief is Mariusz Ratajczak.
Open Theology is a peer-reviewed open access academic journal published by De Gruyter since 2015. It covers theology and religious studies. The editor-in-chief is Charles Taliaferro.
Bentham Science Publishers is a company that publishes scientific, technical, and medical journals and e-books. It publishes over 120 subscription-based academic journals and around 40 open access journals.
Open Mathematics is a peer-reviewed open access scientific journal covering all areas of mathematics. It is published by Walter de Gruyter and the editors-in-chief are Salvatore Angelo Marano and Vincenzo Vespri.
Nature Communications is a peer-reviewed, open access, scientific journal published by Nature Portfolio since 2010. It is a multidisciplinary journal that covers the natural sciences, including physics, chemistry, earth sciences, medicine, and biology. The journal has editorial offices in London, Berlin, New York City, and Shanghai.
Paladyn, Journal of Behavioral Robotics, is a peer-reviewed open-access scientific journal covering topics broadly related to neuronally and psychologically inspired robots and other behaving autonomous systems. It was established in 2010 and is published by Walter de Gruyter. The editor-in-chief is Gregor Schöner.
The International Journal of Applied Mathematics and Computer Science is a peer-reviewed quarterly scientific journal published since 1991 by the University of Zielona Góra in partnership with De Gruyter Poland and Lubuskie Scientific Society, under the auspices of the Committee on Automatic Control and Robotics of the Polish Academy of Sciences. The editor-in-chief is Józef Korbicz. The journal covers various fields related to control theory, applied mathematics, scientific computing, and computer science.
Open Chemistry is a monthly peer-reviewed open access scientific journal covering all fields of chemistry. It is published by Walter de Gruyter. The editor-in-chief is Joaquín Plumet,.
Open Physics is a peer-reviewed open access scientific journal covering all aspects of physics. It is published by De Gruyter and the editor-in-chief is Sally Seidel. Occasionally, the journal publishes special issues on a specific topic.
Open Medicine is a peer-reviewed open access medical journal. It is published by De Gruyter and the editor-in-chief is Prof. Eric J.G. Sijbrands. It was established in 2006 as the Central European Journal of Medicine, co-published by Versita and Springer Science+Business Media. In 2014 the journal was moved to De Gruyter. It obtained its current name in 2015 when it became open access.
Open Geosciences is a peer-reviewed open-access scientific journal covering all aspects of the Earth sciences. It is published by De Gruyter and the editor-in-chief is Piotr Jankowski. The journal was established in 2009 as the Central European Journal of Geosciences, co-published by Versita and Springer Science+Business Media. In 2014, the journal was moved to De Gruyter. It obtained its current name in 2015, when it became open-access.
IEEE Access is a peer-reviewed open-access scientific journal published by the Institute of Electrical and Electronics Engineers (IEEE). It was established in 2013 and covers all IEEE fields of interest. The founding editor-in-chief was Michael Pecht and the current editor-in-chief is Derek Abbott. The journal won a PROSE Award in 2015 for the best new journal in science, technology, engineering, and mathematics.
Geofísica Internacional is a quarterly peer-reviewed open-access scientific journal published by the Instituto de Geofísica of the National Autonomous University of Mexico. It covers all aspects of geophysics and tectonics pertaining to Latin America. It was established in 1961 and the editor-in-chief is Servando de la Cruz Reyna.
Acta Mechanica et Automatica is an English-language peer-reviewed open access scientific journal that publishes high-quality theoretical and experimental articles on all aspects of mechanics, automation and robotics. The journal was founded in 2007 at the Faculty of Mechanical Engineering of Bialystok University of Technology. The Scopus CiteScore, which measures average citations received per article published in the serial, is 0.5 (2016).
Open Agriculture is a peer-reviewed open access scientific journal covering research on all aspects of agriculture, horticulture, plant science, soil science, food science, and related topics. Occasionally, the journal publishes special issues on a specific topic. It is published by De Gruyter and the editors-in-chief are Hans Rudolf Herren and Vijay P. Singh.
