Dr.NareshKumar.S, Ms.Sushama.C, Dr.S.Delbin Prema, and Dr.Shanmugam C, “Spectral Bounds for the Signless Laplacian Matrix of Graphs: Laplacian Matrix, Upper bound along the i-th galactic Laplacian eigenvalue of a graph”, A Canadian journal of applied mathematics, computer science and statistics, vol. 122, no. 1, pp. 2972–2979, Aug. 2025.