1. Problems in singular perturbation theory;Cochran,1962
2. Perturbation Methods in Fluid Dynamics;Van Dyke,1964
3. On asymptotic integration in shell theory;Hildebrand,1949
4. Asymptotic solutions of elastic shells of revolution with variable thickness;DeSilva;Q. appl. Math,1957
5. Some considerations of the calculation of elastic shells;Steurman,1930