Discussiones Mathematicae Graph Theory 32(1) (2012)
109-119

doi: 10.7151/dmgt.1589

A.P. Santhakumaran
Department of Mathematics | T. Jebaraj
Department of Mathematics |

**Keywords:** geodetic number, weak-extreme vertex, double geodetic set, double geodetic number

**2010 Mathematics Subject Classification:** 05C12.

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[4] | F. Harary, Graph Theory (Addision-Wesely, 1969). |

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Received 30 June 2010

Revised 17 January 2011

Accepted 1 February 2011