Helmberg, Christoph, Guilherme Porto, Guilherme Torres, and Vilmar Trevisan. “An Interlacing Property of the Signless Laplacian of Threshold Graphs”. The Electronic Journal of Combinatorics 32, no. 1 (February 28, 2025): P1.32. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v32i1p32.