P. PREMVARANON and A. TERALAPSUWA. (2014) Energy comparison of the optics and tracking system for evacuated solar thermal collector by using ray tracing analysis. <i>Journal of Research and Applications in Mechanical Engineering</i>, <i>2</i>(1), 74-83.P. PREMVARANON and A. TERALAPSUWA. "Energy comparison of the optics and tracking system for evacuated solar thermal collector by using ray tracing analysis". Journal of Research and Applications in Mechanical Engineering 2 (2014):74-83.P. PREMVARANON and A. TERALAPSUWA. Energy comparison of the optics and tracking system for evacuated solar thermal collector by using ray tracing analysis. Thai Society of Mechanical Engineers:ม.ป.ท. 2014.