There is a "Contact us" link at the bottom of each page. However, it is not worth writing to them, because citations are added only automatically, not by hand. See Rob Keller 's reply to this similar question: https://www.researchgate.net/post/You_state_that_I_have_207_citations_Google_Scholar_has_the_number_at_507_Why_the_large_discrepency

See also these older discussion on missing citations:

https://www.researchgate.net/post/RG-citations-how-are-they-calculated/1

https://www.researchgate.net/post/missing_citation_number/1

https://www.researchgate.net/post/Why_are_some_of_my_citations_not_shown2/1

https://www.researchgate.net/post/Why_the_citation_is_not_shown/1

https://www.researchgate.net/post/How_can_we_add_citation_on_research_gate/1

https://www.researchgate.net/post/How_add_references/1

https://www.researchgate.net/post/Citations_from_RG/1

https://www.researchgate.net/post/citations_in_RG/1

https://www.researchgate.net/post/How_do_you_fix_missing_citations/1

https://www.researchgate.net/post/How_to_add_missing_citation/1

https://www.researchgate.net/post/What_if_I_have_citations_in_the_research_gate_indexed_papers_that_research_gate_does_not_show_them/1

https://www.researchgate.net/post/Question_about_article_submitted_and_references_does_not_appear

https://www.researchgate.net/post/RG_system_to_detected_Citations

Dear Dr.

You can use the link

https://help.researchgate.net/hc/en-us/requests/new?ticket_form_id=13146494812305