In this paper, we characterize the solution of a nonlinear reflected Backward Stochastic Differential Equations (BSDE) as the unique solution of a Stochastic Variational Inequality (SVI). This approach leads to a priori estimate for the increment of the predictable component of the solution of the reflected BSDE.
"Stochastic Variational Inequality and Reflected BSDE with Single $L^2$ Obstacle." Afr. Diaspora J. Math. (N.S.) 16 (1) 37 - 54, 2013.