Tabei, K., Haruyamu, S., Yamaguchi, S., Shirai, H. and Takakusagi, F. (2007). “Study
                           of microbubble generation by swirl jet.” Journal of Environment and Engineering, Vol.
                           2, No. 1, pp. 172-18210.1299/jee.2.172Tabei, K., Haruyamu, S., Yamaguchi, S., Shirai,
                           H. and Takakusagi, F. (2007). “Study of microbubble generation by swirl jet.” Journal
                           of Environment and Engineering, Vol. 2, No. 1, pp. 172-182
