Periodic and asymptotically periodic solutions of neutral integral equations. Burton, T.A., Furumochi, Tetsuo (2000) Electronic Journal of Qualitative Theory of Differential Equations [electronic only]
Periodic solutions of neutral delay integral equations of advanced type. Islam, Muhammad N., Sultana, Nasrin, Booth, James (2010) Electronic Journal of Differential Equations (EJDE) [electronic only]
Positive solutions of a renewal equation Janusz Traple (1992) Annales Polonici Mathematici An existence theorem is proved for the scalar convolution type integral equation x ( t ) = ∫ - ∞ ∞ h ( t - s ) f ( s , x ( s ) ) d s .