A. Perdih, On topological indices indicating branching - Part 4. The susceptibility for branching as a source of RVA-type reference values or of BIA-type indices, ACTA CHIM S, 48(2), 2001, pp. 241-246
Branching indices (BIM) or reference values (RVM) obeying the Methane-based
definition as well as those obeying the n-Alkane-based definition of branc
hing (BIA or RVA) can be derived from the susceptibility for branching, S-i
f, of other topological indices or physicochemical properties.