Litmaps (https://www.litmaps.com) is a search engine specialized in scientific literature from Google scholar, Semantic Scholar or its own “Litmaps”.

From a selection of articles, visualizations – the Litmaps – are created and highlight the links between the articles (references, citations, etc.). The “monitor” allows you to be notified of new publications. Multiple exports and shares offered.

1 monthly alert, 20 terms per search, 2 litmaps and 100 articles per Lipmaps in free version.