Al-Hawasy, Jamil A., and Mohammed A. K. Jaber. “The Continuous Classical Boundary Optimal Control Vector Governing by Triple Linear Partial Differential Equations of Parabolic Type”. Ibn AL-Haitham Journal For Pure and Applied Sciences, vol. 33, no. 3, July 2020, pp. 113-26, https://doi.org/10.30526/33.3.2478.