Liu, X., J. Han, Y. Lei, D. Yue, and H. Tian. “A Delay-Embedded D-SIRS Model for Associated Credit Risk Contagion on Complex Networks: Threshold, Equilibrium, and Robustness Analysis”. Contemporary Mathematics, vol. 7, no. 4, July 2026, pp. 4748-70, doi:10.37256/cm.7420269876.