James, A., Jayaraj, S., Srinivas, M., & Mohanraj, M. (2021). Energy-Efficient Operation of PV-T Solar Collectors with Heat Pump based Water Heaters Suitable for Domestic Applications. International Journal of Mathematics and Physics, 12(1), 12–18. https://doi.org/10.26577/ijmph.2021.v12.i1.02