KARADZHOV, Yu. A. Three-Dimensional Matrix Superpotentials. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 64, n. 12, p. 1641–1640, 2012. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2688. Acesso em: 14 apr. 2025.