Hirai, S., M. Komura, V. Saechout, S. Sugaya, S. Aoki, and T. Takahashi. “Development of High Density Micro-Bubble Generator for Environmental Technology”. Elektronika ir Elektrotechnika 92, no. 4 (April 19, 2009): 37-40. Accessed September 27, 2022. https://eejournal.ktu.lt/index.php/elt/article/view/10222.