Liu, Chengze, Chenxing Sheng, Xiang Rao, Bo Zhao, and Zhijun Chen. “A Portable Sensor Device for Real-Time Viscosity Measurement of Lubricating Oil”. Elektronika ir Elektrotechnika 31, no. 5 (October 31, 2025): 26–34. Accessed March 20, 2026. https://eejournal.ktu.lt/index.php/elt/article/view/43645.