1. On the generalized Emden-Fowler equation;Wong;SIAM Rev.,1975
2. R. Emden, Gaskuglen, Springer, Leipzig (1907).
3. Introduction to Nonlinear Differential and Integral Equations;Davis,1962
4. Further studies of Emden's and similar differential equations;Fowler;Q. J. Math.,1931
5. Non-Linear Differential Equations of Chemically Reacting Systems;Gavalas,1968