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Tursunov Dilmurat Abdilllajanovich «Asymptotic expansion of the solution of a singularly perturbed ordinary second-order differential equation with two turning points» // 2013. №1(21) C.34-40
Tursunov Dilmurat A. «Asymptotics of the Сauchy problem solution in the case of instability of a stationary point in the plane of "rapid motions"» // Tomsk State University Journal of Mathematics and Mechanics 2018. №54 C.46-57