References
Akhiezer, N. and Glazman, I. ( 1966) The Theory of Linear Operators in
Hilbert Space. Nauka: Moscow (in Russian).Alekseevski1, M. (1984) Difference schemes of higher-order accuracy for
some singular-perturbed boundary-value problems. Differential Equations,
17, 1177-1183 (in Russian).
Aines, W. ( 1977) N unwric al lVIethods for Partial Differential Equations.
Acaden1ic Press: New York-London.
Andreev, V. and Savin, I. (1995) On the uniform convergence in a small
parameter of Sarnarskil'' scheme and its modification. Zh. Vychisl. Mat.
i Iviat. Fiz., 35, 739-752 (in Russian); English transl. in USSR Comput.
Mathern. and Mathern. Physics.
Babuska, I., Pager, IvI. and Vitasek, E. (1966) Nun1erical Processes in Dif-
ferential Equations. vViley: Chichester.
Bagmut, G. ( 1969) Difference sche111es of higher-order accuracy for an ordi-
nary differential equations with singularity. Zh. Vychisl. Mat. i Mat. Fiz.,
g, 221-226 (in Russian); English transl. in USSR Comput. Mathern. and
Mathen1. Physics.
Balakrishnan, A. (1976) Applied Functional Analysis. Springer: New-York-
Berlin-Heidel berg.
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