Sopajarn, Jerawat, Krerkchai Thongnoo, and Montri Karnjanadecha. 2017. “Study of Suitable Illumination Techniques for Solder Dot Volume Measurement on Printed Circuit Card Assembly”. Asia-Pacific Journal of Science and Technology 19 (5):636-44. https://so01.tci-thaijo.org/index.php/APST/article/view/83001.