Charakterisierungen der primitiven Klassen arithmetischer Ringe. Rudolf Wille, Heinrich Werner (1970) Mathematische Zeitschrift
Locally compact topologically nil and monocompact PI-rings. Ursul, M.I. (2001) Beiträge zur Algebra und Geometrie
Noncommutative algebraic geometry: From pi-algebras to quantum groups. Verschoren, A., Willaert, L. (1997) Bulletin of the Belgian Mathematical Society - Simon Stevin
P ( r , m ) near-rings. Balakrishnan, R., Suryanarayanan, S. (2000) Bulletin of the Malaysian Mathematical Sciences Society. Second Series
The Local Duality for Homomorphisms and an Application to Pure Semisimple PI-Rings Markus Schmidmeier (1998) Colloquium Mathematicae
Конечность базиса тождеств конечно-порожденной альтернативной PI-алгебры над полем характеристики нуль. А.В. Ильтяков (1991) Sibirskij matematiceskij zurnal