Prokopchuk Alexandr Vasil'evich

Publications in Math-Net.Ru

1. Invariant subalgebras of involutorial quaternion division algebras
   
   Zap. Nauchn. Sem. POMI, 388 (2011),  196–209
2. On another proof for B. Sury's theorem
   
   Zap. Nauchn. Sem. POMI, 365 (2009),  196–207