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Burton, T. A.: A Liapunov functional for a linear integral equation. Electronic journal of qualitative theory of differential equations 10. pp. 1-10. (2010)
Burton, T. A.: Fixed points and differential equations with asymptotically constant or periodic solutions. Electronic journal of qualitative theory of differential equations 11. pp. 1-31. (2004)
Burton, T. A.; Makay, Géza: Continuity, compactness, fixed points, and integral equations. Electronic journal of qualitative theory of differential equations 14. pp. 1-13. (2002)