Bornmann, Peter, Tobias Hemsel, Walter Littmann, Ryo Ageba, Yoishi Kadota, and Takeshi Morita. “Ultrasonic Transducer for the Hydrothermal Method.”https://doi.org/10.3938/jkps.57.1122__Journal of Korean Physical Society 57, no. 4 (2010): 1122.https://doi.org/10.3938/jkps.57.1122 .