[1] |
Friedman, A., Singular perturbations for the Cauchy problem and for boundary value problems, J. Differential Equations, 5, 226-261 (1969) · Zbl 0182.42301 |
[2] |
Kato, T., Some mathematical problems in quantum mechanics, Suppl. Progr. Theoret. Phys., 40, 3-19 (1967) |
[3] |
Kato, T., Perturbation Theory for Linear Operators (1966), Springer-Verlag: Springer-Verlag Berlin · Zbl 0148.12601 |
[4] |
O’Malley, R. E., Topics in singular perturbations, (Busemann, H., Advances in Mathematics, Vol. 2 (1968), Academic Press: Academic Press New York), 365-470, Fasc. 4 · Zbl 0203.40101 |
[5] |
Riesz, F.; -Nagy, B. Sz, Functional Analysis (1955), Ungar: Ungar New York |
[6] |
Schiff, L. I., Quantum Mechanics (1968), McGraw-Hill: McGraw-Hill New York · Zbl 0068.40202 |
[7] |
Schoene, A. Y., Semi-groups and a class of singular perturbation problems, Indiana Univ. Math. J., 20, 247-263 (1970) · Zbl 0219.47034 |
[8] |
Smoller, J. A., Singular perturbations of Cauchy’s problem, Comm. Pure Appl. Math., 18, 665-677 (1965) · Zbl 0151.20302 |
[9] |
Zlamal, M., On a Singular Perturbation Problem Concerning Hyperbolic Equations, (Institute for Fluid Dynamics and Applied Mathematics, Lecture Series No. 45 (1965), Univ. of Maryland: Univ. of Maryland College Park) · Zbl 0161.30303 |