Dymarskii YM. Manifolds of Eigenfunctions and Potentials of a Family of Periodic Sturm–Liouville Problems. Ukr. Mat. Zhurn. [Internet]. 2002Aug.25 [cited 2024Nov.22];54(8):1042-5. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/4145