The first and second Zagreb indices of some graph operations MH Khalifeh, H Yousefi-Azari, AR Ashrafi Discrete applied mathematics 157 (4), 804-811, 2009 | 446 | 2009 |

Vertex and edge PI indices of Cartesian product graphs MH Khalifeh, H Yousefi-Azari, AR Ashrafi Discrete Applied Mathematics 156 (10), 1780-1789, 2008 | 216 | 2008 |

The hyper-Wiener index of graph operations MH Khalifeh, H Yousefi-Azari, AR Ashrafi Computers & Mathematics with Applications 56 (5), 1402-1407, 2008 | 201 | 2008 |

Some new results on distance-based graph invariants MH Khalifeh, H Yousefi-Azari, AR Ashrafi, SG Wagner European Journal of Combinatorics 30 (5), 1149-1163, 2009 | 183 | 2009 |

A matrix method for computing Szeged and vertex PI indices of join and composition of graphs MH Khalifeh, H Yousefi-Azari, AR Ashrafi Linear algebra and its applications 429 (11-12), 2702-2709, 2008 | 100 | 2008 |

Calculating the edge Wiener and edge Szeged indices of graphs H Yousefi-Azari, MH Khalifeh, AR Ashrafi Journal of computational and applied mathematics 235 (16), 4866-4870, 2011 | 87 | 2011 |

The edge Szeged index of product graphs MH Khalifeh, H Yousefi-Azari, AR Ashrafi, I Gutman Croatica Chemica Acta 81 (2), 277-281, 2008 | 82 | 2008 |

Another aspect of graph invariants depending on the path metric and an application in nanoscience MH Khalifeh, H Yousefi-Azari, AR Ashrafi Computers & Mathematics with Applications 60 (8), 2460-2468, 2010 | 37 | 2010 |

Computing Wiener and Szeged indices of an achiral polyhex nanotorus S Yousefi, H Yousefi-Azari, AR Ashrafi, MH Khalifeh JSUT 33 (3), 7-11, 2008 | 36 | 2008 |

Computing vertex-PI index of single and multi-walled nanotubes H Yousefi-Azari, AR Ashrafi, MH Khalifeh Digest Journal of Nanomaterials and Biostructures 3 (4), 315-318, 2008 | 31 | 2008 |

Computing Wiener and Kirchhoff indices of a triangulane MH Khalifeh, H Yousefi-Azari, AR Ashrafi CSIR, 2008 | 26 | 2008 |

A method for computing the Wiener index of one-pentagonal carbon nanocones MH Khalifeh, H Yousefi-Azari, AR Ashrafi Current Nanoscience 6 (2), 155-157, 2010 | 19 | 2010 |

The Wiener, Szeged and PI-indices of a phenylazomethine dendrimer M Golriz, MR Darafsheh, MH Khalifeh Digest. J. Nanomater. Bios 6 (4), 1545-1549, 2011 | 18 | 2011 |

THE SZEGED AND WIENER NUMBERS OF WATER-SOLUBLE POLYARYL ETHER DENDRIMER NANOSTARS. MH Khalifeh, H Yousefi-Azari, AR Ashrafi Digest Journal of Nanomaterials & Biostructures (DJNB) 4 (1), 2009 | 16 | 2009 |

The Wiener, Szeged, and PI indices of a dendrimer nanostar MH Khalifeh, MR Darafsheh, H Jolany Journal of Computational and Theoretical Nanoscience 8 (2), 220-223, 2011 | 14 | 2011 |

Order of magnitude of the PI index MH Khalifeh, H Yousefi-Azari, AR Ashrafi MATCH Commun. Math. Comput. Chem 65, 51-56, 2011 | 13 | 2011 |

Topological indices of nanotubes, nanotori and nanostars H Yousefi-Azari, AR Ashrafi, MH Khalifeh Digest Journal of Nanomaterials and Biostructures 3 (4), 2008 | 13 | 2008 |

The Hyper-Wiener Index of One-pentagonal Carbon Nanocone M R. Darafsheh, M H. Khalifeh, H Jolany Current Nanoscience, 2013 | 11* | 2013 |

Calculation of the Wiener, Szeged, and PI indices of a certain nanostar dendrimer. MR Darafsheh, MH Khalifeh Ars Comb. 100, 289-298, 2011 | 10 | 2011 |

Computing distance matrix and related topological indices of an achiral polyhex nanotube S Yousefi, H Yousefi-Azari, MH Khalifeh, AR Ashrafi Int J Chem Mod 1, 149-156, 2008 | 5 | 2008 |