1. S. Asirov andJ. D. Mamedov, Investigation of solutions of nonlinear Volterra-Fredholm operator equations,Dakl. Akad. Nauk. SSSR,229 (1976), 982–986.
2. I. Bihari, Notes on a nonlinear integral equation,Studia Sci. Math. Hungar. 2 (1967), 1–6.
3. S. I. Grossman, Existence and stability of a class of nonlinear Volterra integral equations,Trans. Amer. Soc. 150 (1970), 541–556.
4. J. Mamedov andV. Musaev, On the theory of solutions of nonlinear operator equations,Dokl. Akad. Nauk. SSSR 195 (1970), 1420–1423.
5. R. Miller,Nonlinear Volterra Integral Equations, W. A. Benjamin, Menlo Pask, California, (1971).