Diameter-essential edges in a graph. - Hanumappa B. Walikar; Fred Buckley; M. K. Itagi (Discret. Math., 2002)

Radius-edge-invariant and diameter-edge-invariant graphs. - Hanumappa B. Walikar; Fred Buckley; M. K. Itagi (Discret. Math., 2003)

DDR Graphs of Diameter Three. - Medha Huilgol; Hanumappa B. Walikar; B. Devadas Acharya (Electron. Notes Discret. Math., 2003)

Partial Complement of a Graph. - Hanumappa B. Walikar (Electron. Notes Discret. Math., 2003)

Some Minimal Graphs by Interlacing Eigenvalues. - Hanumappa B. Walikar; P. R. Hamipholi; Harishchandra S. Ramane (Electron. Notes Discret. Math., 2003)

On the Resistance Distance of a Tree. - Hanumappa B. Walikar; D. N. Misale; R. L. Patil; Harishchandra S. Ramane (Electron. Notes Discret. Math., 2003)

On the Eigenvalues of a Graph. - Hanumappa B. Walikar; Harishchandra S. Ramane (Electron. Notes Discret. Math., 2003)

Spectra and energies of iterated line graphs of regular graphs. - Harishchandra S. Ramane; Hanumappa B. Walikar; Siddani Bhaskara Rao; B. Devadas Acharya; Prabhakar Ramrao Hampiholi; Sudhir R. Jog; Ivan Gutman (Appl. Math. Lett., 2005)

Designs associated with maximum independent sets of a graph. - Hanumappa B. Walikar; B. Devadas Acharya; Shailaja S. Shirkol (Des. Codes Cryptogr., 2010)

Graphs that are not domatically Co-Critical. - Hanumappa B. Walikar; L. Sudershan Reddy (Discret. Math. Algorithms Appl., 2011)

Few More Results in domatically Co-Critical Graphs. - Hanumappa B. Walikar; L. Sudershan Reddy; S. B. Basapur (Discret. Math. Algorithms Appl., 2013)