Estrada, E.; Matamala, A. R. GTI-Space: The Space of Generalized Topological Indices. Journal of Mathematical Chemistry, 43, 2008, 508-517.

Estrada, E.; Matamala, A. R. GTI-Space: The Space of Generalized Topological Indices. Journal of Mathematical Chemistry, 43, 2008, 508-517. [PDF]