TAMIL SELVAN, M., and R Murugesu. “Approximate Controllability of Second-Order Neutral Evolution Equations With Nonlocal Conditions”. Journal of Global Research in Mathematical Archives(JGRMA) 5, no. 1 (January 18, 2018): 58–76. Accessed May 9, 2025. https://www.jgrma.com/index.php/jgrma/article/view/358.