Gabriel Р, Nazarova LA, Roiter AV, Sergeychuk VV, Vossieck D. Tame and wild subspace problems. Ukr. Mat. Zhurn. [Internet]. 1993 Mar. 25 [cited 2025 Dec. 5];45(3):313–352. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5815