“AUTOMORPHISMS OF ALGEBRAS AND BOCHNER‘S PROPERTY FOR DISCRETE VECTOR ORTHOGONAL POLYNOMIALS”, Ann. Sofia Univ. Fac. Math. and Inf., vol. 104, pp. 23–38, Dec. 2017, Accessed: Feb. 04, 2026. [Online]. Available: https://annual.uni-sofia.bg/index.php/fmi/article/view/35