Akpootu, Davidson Odafe, et al. “A Comparative Study for the Estimation of Downward Longwave Radiation under Clear Sky Condition across the Midland Climatic Zone of Nigeria”. Nigerian Journal of Physics, vol. 35, no. 3, July 2026, pp. 291-06, https://doi.org/10.62292/njp.v35i3.2026.603.