Skrypnyk, T. “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, no. 3 (September 25, 1999): 77–89. Accessed December 17, 2025. https://zen.imath.kiev.ua/index.php/mfat/article/view/100.