Web of Science (Clarivate Analytics)

There are 998 citations for articles published in the journal OPJ as of June 2019, which increase by 29% compared to 771 citations as of June 2018.

Please click the following link to see the screenshot.

Google Scholar
There are 2119 citations for articles published in OPJ journal as of September 2019 based on the statistics from Google Scholar.

The 2-year Google-based Journal Impact Factor (2-GJIF) is 0.69.

OPJ has been indexed by several world class databases. For more information, please access the following links:

• AiritiLibrary

• Base-Search

• CALIS

• Chemical Abstracts Service (CAS)

• Citefactor

• CNKI SCHOLAR

• COPAC

• Elektronische Zeitschriftenbibliothek(EZB)

• GETIT@YALE(Yale University Library)

• Harvard Library E-Journals

• Infotrieve

• i-Scholar

• JournalSeek

• JournalTOCs

• National Science and Technology Library(NSTL)

• National Science Library, Chinese Academy of Sciences (NSLC)

• Open Access Journals Search Engine(OAJSE)

• Open Access Library

• SciLit|OPJ

• SHERPA/RoMEO

• Stanford University Libraries

• Technische Informationsbibliothek (TIB)|OPJ

• The Library of Congress

• Ulrich

• WanFang

• Worldcat

• WRLC Catalog

• Zeitschriftendatenbank (ZDB)