Figure 4.

(A) Annual output of the top 10 most productive authors in HP/GC (the size of the circle represents output, with larger circles indicating higher output; the color depth of the circle indicates annual citations, with darker colors indicating more citations). (B) Co-authorship network of the 20 most productive in HP/GC (each node represents an author; each color represents a collaborative group; each line represents a coordination relationship, with thickness indicating collaboration intensity).