Das, Sanjukta, et al. “Approximate Controllability of a Second-Order Neutral Stochastic Differential Equation With State Dependent Delay: (Article Has Been Withdrawn)”. Nonlinear Analysis: Modelling and Control, vol. 21, no. 6, Nov. 2016, pp. 751-69, https://doi.org/10.15388/NA.2016.6.2.