Sugiri, Mochamad, Budhi Muliawan Suyitno, Erlanda Augupta Pane, Gunadi Haryanto, and Ismail Ismail. 2026. “Improvement of Thermal Performance of an Indirect Flat Plate Solar Collector in Solar Water Heater Applications”. Eastern-European Journal of Enterprise Technologies 2 (8 (140):41-49. https://doi.org/10.15587/1729-4061.2026.358842.