@article{paperid:1034566,
author = {Tavakoli, Mostafa and Rahbarnia, Freydoon},
title = {The Vertex and Edge PI Indices of Generalized Hierarchical Product of Graphs},
journal = {Journal of Applied Mathematics and Informatics},
year = {2013},
volume = {31},
number = {3},
month = {May},
issn = {1598-5857},
pages = {469--477},
			numpages = {8},
keywords = {Hierarchical product; generalized hierarchical product; vertex PI index; edge PI index.},
}