Estrada, E.; Rodriguez-Velazquez, J. A.; Randic, M. Atomic branching in molecules. International Journal of Quantum Chemistry 106, 2006, 823-832.

E Estrada,  Rodriguez-Velazquez, J. A.; Randic, M. Atomic branching in molecules.International Journal of Quantum Chemistry 106, 2006, 823-832. [PDF]