1. Ultrasonics in medicine, principle, research and practice,1966
2. Clinical experience with an echoendoscope;Hoshi;Gastroenterol Endosc,1981
3. The investigation of the ultrasonic endoscope;Aibe;Gastroenterol Endosc,1981
4. The investigation of the ultrasonic endoscope (the second report);Aibe;Gastroenterol Endosc,1982
5. Ultrasonic endoscopy for the diagnosis of abdominal lesions. I. Clinical evaluation of an ultrasonic gastroendoscope with electronic linear scanning system (prototype);Yamanaka;Gastorenterol Endosc,1982