2. P. Muthukumar and P. Balasubramaniam, Approximate controllability of second-order damped McKean–Vlasov stochastic evolution equations, Computers & Mathematics with Applications, Volume 60, Issue 10, November 2010, Pages 2788–2796, http://dx.doi.org/10.1016/j.camwa.2010.09.032

1. P. Balasubramaniam, J. Y. Park and P. Muthukumar, Approximate Controllability of Neutral Stochastic Functional Differential Systems with Infinite Delay, Stochastic Analysis and Applications, vol.28, no.2, 01st  February 2010, Pages 389-400, DOI:10.1080/07362990802405695