Both ResearchGate and Google Scholar use automated algorithms to identify citations. Very often, none of these find all citations. It is useless to contact the staff because they will not add millions of citations by hand.
Thank you Dr. Wolfgang R. Dick for the clarification. I appreciate your way of making me understand the background of algorithms involved in citations. Thank you once again.
As indicated by Wolfgang R. Dick unfortunately none of these indexes/databases are flawless. Unfortunately at least one of the citations in Semantic Scholar https://www.semanticscholar.org/paper/Utilization-of-Waste-Plastic-In-Bitumen-Mahalakshmi-Priyankaprakash/69506e6a4a98a836eef74929d7d83742bd873b71 doesn’t cite your paper: Comparative Analysis of Conventional and Waste Polyethylene Modified Bituminous Mixes https://www.atlantis-press.com/proceedings/rsete-13/8199
And one entitled “Use of Plastic in Road Construction Material : Towards Solid Waste Minimization” is untraceable in both Google and Google scholar.
However “Experimental study on characteristics of bitumen mixed with plastic waste and natural fiber” (https://www.ijariit.com/manuscripts/v5i4/V5I4-1311.pdf ) really cites your paper, but unfortunately, this paper in IJARIT is not uploaded in ResearchGate and I was unable to find the authors (here on RG).
I saw your GS profile. Unfortunately (most of) the journals where you published your papers in have no presence on Google Scholar (and manually add your papers to your profile does not really make them ‘indexed’ and searchable in GS). Not sure how long ago you uploaded your papers here on RG but sometimes it works to upload your paper on academia.edu as well (with the limited free version you can upload your papers) to increase and speed up the time it takes for Google Scholar to pick up your papers (and possible citations).
Thank you so much Dr. Rob Keller for the detailed analysis of my citations. I appreciate you for taking time to refer both of my RG and GS profiles. Yes, I couldn't update in GS atleast the ones showing in RG, since GS shows me 2 citations with a * and RG gives me 3 citations. Thank you so much for providing me a valuable information of sharing in academia.edu. I will upload my papers in academic.edu. Thank you so much. That was really helpful.