Team, S. “Non-Differentiable Delay-Interval-Dependent Exponentially Passive Conditions for Certain Neutral Integro-Differential Equations With Time-Varying Delays: Watcharin Chartbupapan, Thongchai Botmart, Kanit Mukdasai, Narongrit Kaewbanjak”. Thai Journal of Mathematics, vol. 18, no. 1, Mar. 2020, pp. 233-51, https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/995.