1.
Berezansky YM, GekhtmanMI. Inverse problem of spectral analysis and the non-Abelian chains of nonlinear equations . Ukr. Mat. Zhurn. [Internet]. 1990Jun.19 [cited 2024Nov.24];42(6):730-47. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/8829