1. Nonlinear Singular Perturbation Phenomena;Chang,1984
2. Singular Perturbation Methods for Ordinary Differential Equations;O’Malley,1991
3. Heat Transfer;Jacob,1959
4. Theory of flows of electrons and holes in germanium and other semiconductors;Roosbroeck;Bell Syst. Tech. J.,1950
5. Numerical Computation of Internal and External Flows;Hirsch,1988