Ukwu, Chukwunenye, and Onyekachukwu Henry Ikeh Ikeh. “Global Structure of Determining Matrices for a Class of Differential Control Systems”. Journal of Mathematics and Statistics Studies, vol. 2, no. 1, June 2021, pp. 88-101, https://doi.org/10.32996/jmss.2021.2.1.8.