Study of the Normality and Continuity for the Mixed Integral Equations with Phase-Lag Term A study of normality and continuity for mixed integral equations Analytical discussion for the mixed integral equations On a discussion of Volterra–Fredholm integral equation with discontinuous kernel A new techniques applied to Volterra-Fredholm integral equations with discontinuous kernel Theoretical and Numerical Discussion for the Mixed Integro-Differential Equations Hybrid Functions Approach via Nonlinear Integral Equations with Symmetric and Nonsymmetrical Kernel in Two Dimensions