Web of Science (Clarivate Analytics)
There are 1341 citations for articles published in the journal PP as of June 2020, which increase by 6% compared to 1260 citations as of June 2019.
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There are 4450 citations for articles published in the journal PP as of December 2019 based on the statistics from Google Scholar.
The 2-year Google-based Journal Impact Factor (2-GJIF) is 0.69.
PP is indexed by CABI, which is one of the 9 databases in the "Web of Science".
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PP has been indexed by several world class databases. For more information, please access the following links: