References
- Geel , R. “ On initial and initial-boundary value problems of hyperbolic type in singular perturbation theory ” . Report 75–16
- Geel , R. “ Singular perturbation problems of hyperbolic type with characteristic boundaries ” . Report 76–07
- Hsiao , G. C. and Weinacht , R. J. 1979 . A singularly perturbed Cauchy problem . J. Math. Anal. Appl. , 71 : 242 – 250 .
- Hsiao G.C. Weinacht R.J. Singular perturbations for a semi-linear hyperbolic equation (in preparation)
- de Jager , E. M. 1975 . Singular perturbations of hyperbolic type, Nieuw Archief voor Wiskunde . 23 ( 3 ) : 145 – 171 .
- Lions , J. L. 1973. . “ Perturbations singulières dans les problèmes aux limites et en contrôle optimal ” . In Lecture Notes in Mathematics 323 Berlin, New York
- Nur , H. S. 1971 . Singular perturbations of differential equations in abstract spaces . Pacific, J.Math. , 36 : 775 – 780 .
- Introduction to Singular Perturbations
- Zlamal , M. “ On a singular perturbation problem concerning hyperbolic equations, Lecture series No. 45 ” .