1. Infinite Interval Problems for Differential, Difference and Integral Equations;Agarwal,2001
2. Positive Solutions of Differential, Difference and Integral Equations;Agarwal,1999
3. Advanced Combinatorics;Comtet,1974
4. Factorisation of Fredholm operators on analytic functions;McNabb;Journal of Functional Analysis,1978
5. An Elementary Treatise on Differential Equations and Their Applications;Piaggio,1960