N. Affia, E. . Okafor, I. . Akwukwaegbu, M. . Olubiwe, and M. . Bassey, “A preliminary Study on Pump Storage Hydro-Electric Power (PSHP) and its Potentials in Sustainable Energy Development in the 21st Century”, J. Environ. Eng. Energy., vol. 3, no. 2, pp. 116–131, Jun. 2026, doi: 10.22105/jeee.v3i2.50.