Skrypnyk, T. (1999) “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”, Methods of Functional Analysis and Topology, 5(3), pp. 77–89. Available at: https://zen.imath.kiev.ua/index.php/mfat/article/view/100 (Accessed: 17 December 2025).