Sandi Klavžar is a professor of mathematics at University of Ljubljana, Slovenia and at University of Maribor, Slovenia. His research interest is discrete mathematics and its applications. Topics include products of graphs, metric graph theory, graph invariants, chemical graph theory, Tower of Hanoi problems, and graph algorithms. He has published the books W. Imrich, S. Klavžar, Product Graphs, Wiley-Interscience, 2000 and W. Imrich, S. Klavžar, D.F. Rall: Topics in Graph Theory, A K Peters, 2008. He is a member of several editorial boards including European Journal of Combinatorics and MATCH Communications in Mathematical and in Computer Chemistry.