Web of Science (Clarivate Analytics)

There are 1125 citations for articles published in the journal OPJ as of June 2020, which increase by 13% compared to 998 citations as of June 2019.

Please click the following link to see the screenshot.

Google Scholar
There are 2619 citations for articles published in OPJ journal as of October 2020 based on the statistics from Google Scholar.

The 2-year Google-based Journal Impact Factor (2-GJIF) is 0.72.

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

• AiritiLibrary

• Base-Search

• CALIS

• ChaoXing Periodicals

• Chemical Abstracts Service (CAS)

• Citefactor

• CNKI SCHOLAR

• Cnplinker

• COPAC

• CQVIP

• CrossRef

• 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

• Open J-Gate

• ResearchGate

• SciFinder

• SciLit

• SHERPA/RoMEO

• Stanford University Libraries

• Technische Informationsbibliothek (TIB)

• The SAO/NASA Astrophysics Data System

• Ulrichsweb

• WanFang

• Worldcat

• Zeitschriftendatenbank (ZDB)