Is there a search engine to show citing articles' extracts
You can use www.semanticscholar.org to see the extractions of the paper citing the specific article you want. In other words, you will see what and how other researchers use that paper, if applicable.
To do so, you need to type and search for the paper you want. You will see a section called &quot;Citations: Publications citing this paper,&quot; and you can read the extractions from this section.
It is easy to use and free. The only limitation of this service is that it might not cover all databases as much as google scholars or other paid services. However, they are increasing their coverage day by day. In any way, it is a useful website to add your research arsenal.