SOME ESTIMATIONS OF SOLUTION OF NONLINEAR BOUNDARY VALUE PROBLEM FOR SECOND ORDER SYSTEMS

Bris, 1954, On boundary value problem for the equation εy=f(x, y, y') for small ε, (Russian), Dokl. Akad. Nauk. SSSR, 95, 429 Howes, 1976, Differential inequalities and applications to nonlinear singular perturbation problems, J. Differential Equations, 20, 133, 10.1016/0022-0396(76)90100-5 Chang, 1984, Singular perturbation of nonlinear boundary value problem, Applied Math. and Mech., 5, 1571 Bernfeld, 1974 Chin-Chin, 1975, Boundary value problem for second and third order differential equations, J. Differential Equations, 18, 258, 10.1016/0022-0396(75)90061-3 Chang, 1984 Petersen, 1965