On varieties of rings whose finite rings are determined by their   zero-divisor graphs
  The zero-divisor graph $\Gamma(R)$ of an associative ring $R$ is the graph whose vertices are all nonzero zero-divisors (one-sided and two-sided) of $R$, and two distinct vertices $x$ and $y$ are joined by an edge iff either $xy=0$ or $yx=0$.   In the present paper, we study some properties of ring varieties where every finite ring is uniquely determined by its zero-divisor graph. 
Yu. N. Maltsev and A. S. Kuzmina
math.RA