[1] Chang, K.W., Singular perturbation of a general boundary value problem, SIAM J.Math.Anal., 3(1972), 520-526.
[2] Chang, K.W., Diagonalization method for a vector boundary problem of singular perturbation type, J.Math.Anal.Appl., 48(1974), 652-665.
[3] Chang, K.W., Singular perturbations of a boundary problem for a vector differential equation, SIAM J.Appl.Math., 30(1976), 42-54.
[4] Ni Shou-ping Singular perturbations of a vector higher-order nonlinear boundary value problems with boundary perturbations, Acta Mathematica Scientia, 4(1984), 345-354(in Chinese).
[5] Bris, N.I., On boundary value problems for the equation εy"=f(x, y, y')for small εe, Dokl.Akad.Nauk SSSR, 95(1954), 429-432(in Russian). |