Figure 3 Results of core authors involved using VOSviewer (version 1.6.18) and the R package “bibliometrix”. (A) The cooperation between core authors. (B) The frequency distribution of scientific productivity and the top 20 authors in total publications. (C) Top authors’ production over time. The line represents an author’s timeline, and Solbiati L has the longest timeline, from 2000 to 2020. The color intensity is proportional to the total citations per year. The bubble size is proportional to the number of documents (Livraghi T in 2001 authored 3 documents and collected 8.5 total citations per year). (D) Top 20 authors in H-index.