MYKYTYUK, Ya. V.; HRYNIV, R. O.; ALBEVERIO, S. Inverse spectral problems for coupled oscillating systems: reconstruction from three spectra. Methods of Functional Analysis and Topology, [S. l.], v. 13, n. 2, p. 110–123, 2007. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/343. Acesso em: 16 dec. 2025.