Beineke L.W., Bagga J.S. Line Graphs and Line Digraphs

New York: Springer, 2021. — 301 p.In the present era dominated by computers, graph theory has come into its own as an area of mathematics, prominent for both its theory and its applications. One of the richest and most studied types of graph structures is that of the line graph, where the focus is more on the edges of a graph than on the vertices.