Dr.NareshKumar.S, Ms.Sushama.C, Dr.S.Delbin Prema and Dr.Shanmugam C 2025. Spectral Bounds for the Signless Laplacian Matrix of Graphs: Laplacian Matrix, Upper bound along the i-th galactic Laplacian eigenvalue of a graph. Utilitas Mathematica . 122, 1 (Aug. 2025), 2972–2979.