1. Graphs with maximal number of adjacent pairs of edges;Ahlswede;Acta Math. Hungar.,1978
2. Exponential second Zagreb index of chemical trees;Balachandran;Trans. Comb.,2021
3. Extremal graphs for weights;Bollobás;Discrete Math.,1999
4. The balanced double star has maximum exponential second Zagreb index;Cruz;J. Comb. Optim.,2021
5. The path and the star as extremal values of vertex-degree-based topological indices among trees;Cruz;MATCH Commun. Math. Comput. Chem.,2019