T. Skrypnyk, “On a new class of the commutative subalgebras of the maximal Gel’fand-Kirillov dimension in the universal enveloping algebra of a simple Lie algebra”, MFAT, vol. 5, no. 3, pp. 77–89, Sep. 1999, Accessed: Dec. 17, 2025. [Online]. Available: https://zen.imath.kiev.ua/index.php/mfat/article/view/100