1. Aouchiche, M., & Hansen, P. (2007). On a conjecture about the Randić index. Discrete Mathematics, 307(2), 262–265.
2. Bianchi, M., Cornaro, A., Palacios, J. L., & Torriero, A. (2019). Lower bounds for the geometric-arithmetic index of graphs with pendant and fully connected vertices. Discrete Applied Mathematics, 257, 53–59.
3. Caporossi, G., Gutman, I., & Hansen, P. (1999). Variable neighborhood search for extremal graphs. 4. Chemical trees with extremal connectivity index. Computers & Chemistry, 23, 469–477.
4. Das, K., Gutman, I., & Furtula, B. (2011). Survey on geometric-arithmetic indices of graphs. MATCH-Communications in Mathematical and in Computer Chemistry, 65, 595–644.
5. Deng, H., Elumalai, S., & Balachandran, S. (2018). Maximum and second maximum geometric-arithmetic index of tricyclic graphs. MATCH-Communications in Mathematical and in Computer Chemistry, 79, 467–475.