Hello Crossref Support and Community,
I have a question regarding the Cited-by service.
I am responsible for system development at the Japan Link Center (JaLC), which is a Crossref member. We register Crossref DOIs for articles, and each article is included in the Cited-by service.
However, we have encountered an issue (and I apologize if this is a recurring question) where the citation data seems to be incorrect for a particular case.
“Citing” Article A: 10.3130/aija.72.25_4
“Cited” Article B: 10.3130/aijt.5.99_1
Article A includes Article B in its reference list, but when checking the citation data for Article B (e.g., via Cited By Links), the citation count is 0.
We are trying to identify the cause of this discrepancy.
We have come up with the following possible reasons. Could you confirm if one of these is the actual cause, or if there might be a different reason?
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The Cited-by system has not yet processed the data.
We assume that Crossref processes metadata deposited in the Cited-by system periodically.
Since the reference metadata for Article A was recently updated, this might simply be a case of the data not yet being processed by the Cited-by system. -
Insufficient metadata in the reference list of Article A.
The metadata for Article B included in the reference list of Article A is as follows:<citation key="16"> <issn>1341-9463</issn> <journal_title>AIJ Journal of Technology and Design</journal_title> <author>克己 久保田</author> <issue>7</issue> <first_page>99</first_page> <cYear>1999</cYear> <unstructured_citation>16) 久保田 克己. ほか. 積雪寒冷地における透明天蓋空間の温度環境計画. 日本建築学会技術報告集. 日本建築学会. (1999) no.7, p.99-104.</unstructured_citation> </citation>
We are concerned that this metadata might be insufficient to establish the citation relationship.
Specifically, the lack of a DOI is worrisome, though according to your documentation, a DOI is not strictly required for the Cited-by service. -
Metadata for Article B is incomplete.
The metadata for Article B, as retrieved from the Crossref API, is here: https://0-api-crossref-org.libus.csd.mu.edu/works/10.3130/aijt.5.99_1
There may be an issue on this side, but the ISSN, issue, and page numbers seem to be correctly deposited.
Our system relies heavily on the Cited-by service, and we want to fully understand how it works to ensure accurate citation data.
We would greatly appreciate your guidance and support in resolving this issue.
Thank you in advance for your assistance!