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"Vertex and edge PI indices of Cartesian product graphs."
M. H. Khalifeh, Hassan Yousefi-Azari, A. R. Ashrafi (2008)
- M. H. Khalifeh, Hassan Yousefi-Azari, A. R. Ashrafi:
Vertex and edge PI indices of Cartesian product graphs. Discret. Appl. Math. 156(10): 1780-1789 (2008)
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