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Boundary value problems for third-order ordinary differential equations with turning points are studied as follows:εy'' + f(x;ε)y″ + g(x;ε)y' + h(x;ε)y = 0 (- a ＜ x ＜ b, 0 ＜＜1),where f( x; 0) has several multiple zero points in ( - a, b ). The