PIVOVARCHIK, V. N.; BOYKO, O. P. Inverse problem for Stieltjes string damped at one end. Methods of Functional Analysis and Topology, [S. l.], v. 14, n. 1, p. 10–19, 2008. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/366. Acesso em: 17 dec. 2025.