Gabriel Р.; NAZAROVA, L. A.; ROITER, A. V.; SERGEYCHUK, V. V.; VOSSIECK, D. Tame and wild subspace problems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 45, n. 3, p. 313–352, 1993. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5815. Acesso em: 5 dec. 2025.