Samoilenko YS, Zavodovsky MV. Spectral theorems for $*$-representations of the algebras $\mathcal{P}_{\Gamma,\chi,com}$ associated with Dynkin graphs. MFAT. 2005;11(1):88-96. Accessed December 16, 2025. https://zen.imath.kiev.ua/index.php/mfat/article/view/270