Jianbo Zhu, Xingxing Wang & Xianlong Fu. (1970). Existence and Blowup of Solutions for Neutral Partial Integro-Differential Equations with State-Dependent Delay.
            <i>Journal of Nonlinear Modeling and Analysis</i>. <i>2</i> (2).
            287-313.
         doi:10.12150/jnma.2020.287