American Mathematical Society. Translations, series 2, v. 101
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Marčenko, V. A. Some questions in the theory of one-dimensional linear differential operators of the second order, (I-II).--Levitan, B. M. Remark on a theorem of V. A. Marčenko. On the asymptotic behavior of the spectral function of a self-adjoint second order differential equation. On a special Tauberian theorem.--Roždestvenskiĭ, B. L. On the discontinuity of solutions of quasilinear equations.