Kwao, Lazarus and Millham, Richard and Oppong, David and Xornam Ativi, Wisdom, MultiFactor Biometrics for Enhanced User Authentication in an E-Health System, Ghana (2020).
Texila International Journal of Management, 2020, Available at SSRN:
https://ssrn.com/abstract=3687496 or http://dx.doi.org/10.2139/ssrn.3687496

D. K. Oppong, E. Obu, T. Asare, G. S. K. Aidam, "Development and validation of the multicopter modelling code: a physics-based tool for multicopter analysis," Aircraft Engineering and Aerospace Technology, April 2022, DOI: 10.1108/AEAT-01-2022-0011