SPICHAK, S. V. Classification of realizations of Lie algebras of vector fields on circle. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 74, n. 3, p. 389–399, 2022. DOI: 10.37863/umzh.v74i3.6270. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6270. Acesso em: 5 dec. 2025.