Allem, Luiz Emilio, Elismar R. Oliveira, and Fernando Tura. “Generating $I$-Eigenvalue Free Threshold Graphs”. The Electronic Journal of Combinatorics 30, no. 2 (May 19, 2023): P2.30. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v30i2p30.