M. Yoshida, M. Minamoto, K. Yamagiwa, A. Ohkawa, S. Tezura. Enhancement of Gas-Liquid Mass Transfer with Unsteadily Forward-Reverse Rotating Multiple Delta Blade Impellers in an Unbaffled Agitated Vessel. 10th Asian Conf. on Fluidized-Bed and Three-Phase Reactors, 26-29 November, Busan, Korea. 2006. PA-13