@article{paperid:1041861,
author = {Tavakoli, Mostafa and Rahbarnia, Freydoon and Ali Reza Ashrafi},
title = {Applications of the generalized hierarchical product of graphs in computing the vertex and edge PI indices of chemical graphs},
journal = {Ricerche di Matematica},
year = {2014},
volume = {63},
number = {1},
month = {May},
issn = {0035-5038},
pages = {59--65},
			numpages = {6},
keywords = {Hierarchical product; Generalized hierarchical product; Vertex PIindex; Edge PI index},
}