“Optimization of Solar Photovoltaics Tilt Angle for Hybrid Solar-Geothermal Heat Pump Applications in Extreme Cold Climate Regions of Northwestern Ontario, Canada”. Global Journal of Energy Technology Research Updates 12 (December 5, 2025): 1–16. Accessed February 16, 2026. https://www.avantipublishers.com/index.php/gjetru/article/view/1760.