- Connected Paper – https://www.connectedpapers.com/
- Scite – https://scite.ai/
- Genei – https://www.genei.io/
- Scholarcy – https://www.scholarcy.com/
- Scihub x now – https://www.google.com/search?q=scihub+x+now&oq=scihub+x+now&aqs=chrome.0.69i59j0i10.328j0j4&sourceid=chrome&ie=UTF-8