PetravchukA. P. (2002) “On Strongly Inert Subalgebras of an Infinite-Dimensional Lie Algebra”, Ukrains’kyi Matematychnyi Zhurnal, 54(7), pp. 1025-1028. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4143 (Accessed: 22November2024).