Bernstein Type Theorems For Minimal Lagrangian Graphs of Quaternion   Euclidean space
  In this paper, we prove some Bernstein type results for $n$-dimensional minimal Lagrangian graphs in quaternion Euclidean space $H^n\cong R^{4n}$. In particular, we also get a new Bernstein Theorem for special Lagrangian graphs in $C^n$ 
Yuxin Dong, Yingbo Han, Qingchun Ji