1. Buckley, F., Harary, F.: Distance in Graphs. Addison-Wesley, Redwood (1990)
2. Chen, J., Zheng, S., Zhao, H., Yang, Y.: Structure-aware protein solubility prediction from sequence through graph convolutional network and predicted contact map. J. Cheminform. 13(1), 1–10 (2021)
3. Estrada, E., Torres, L., Rodriguez, L., Gutman, I.: An atom-bond connectivity index: modelling the enthalpy of formation of alkanes. Indian J. Chem. Sect. 37A, 849–855 (1998)
4. Fajtlowicz, S.: On conjectures of Graffiti-II. Congr. Numer. 60, 187–197 (1987)
5. Frucht, R., Harary, F.: On the corona of two graphs. Aequ. Math. 4(3), 322–325 (1970)