KAUČIKAS, Algirdas. On noncommutative Hilbert rings. Lietuvos matematikos rinkinys, [S. l.], v. 43, n. spec., p. 13–19, 2003. DOI: 10.15388/LMR.2003.32311. Disponível em: https://journals.vu.lt./LMR/article/view/32311.. Acesso em: 21 nov. 2024.