Mirmanto, M. “Effect of a Pipe Number on The Heat Transfer Rate For a Granit Stone Absorber Solar Collector”. MECHANICAL ; Jurnal Ilmiah Teknik Mesin 7, no. 2 (September 15, 2016). Accessed December 26, 2025. http://journal.eng.unila.ac.id/index.php/mech/article/view/600.