1. Baldwin P (1985) Zeros of generalized Airy functions. Mathematika 32:104–117
2. Bender CM, Orszag SA (1978) Advanced mathematical methods for scientists and engineers. McGraw-Hill, New York
3. Carrier GF, Krook M, Pearson CE (1966) Functions of a complex variable. McGraw-Hill, New York
4. Davis WM (1899) The geographical cycle. Geogr J 14:481–504
5. Drazin PG, Reid WH (1981) Hydrodynamic stability. Cambridge University Press, Cambridge