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R. B. Bapat, S. Sivasubramanian: PRODUCT DISTANCE MATRIX OF A GRAPH AND SQUARED DISTANCE MATRIX OF A TREE - ready for print
2000 Mathematical Subject Classification: 15A15, 05C05
Keywords and phrases: Distance, trees, degrees, block, line graph.
Arumugam Subramanian, Karam Ebadi, Sathikala L: Twin Domination and Twin Irredundance in Digraphs - accepted manuscript
Received: September 07, 2012., Revised: March 06, 2013
2000 Mathematical Subject Classification: 05C20, 05C69
Keywords and phrases: twin irredundance number, twin domination number, twin irredundant set, twin dominating set, directed graph.