1. (1) Mandai, S., Inada, M., Akita, E., Tanimura, S., Development of Low NOx Combustor for Firing Durl Fuel, Mitsubishi Heavy Industries, Ltd. Technical Review, Vol.36, No.3 (1999), pp. 70-74
2. (2) Nambu, Y., Ochiai, K., Akiba, D., Nagakubo, T., Matsuda, S., High-Aspect-Ratio Microdrilling of Cobalt-Based Superalloy, Journal of the Japan Society for Precision Engineering (in Japanese), Vol.75, No.9 (2009), pp. 1083-1087
3. (3) Onikura, H., Ohnishi, O., Drilling Mechanisms in Ultrasonic-Vibration Assisted Microdrilling, Journal of the Japan Society for Precision Engineering (in Japanese), Vol.64, No.11 (1998), pp. 1633-1637
4. Fabrication of Micro Flat Drills by Precision Grinding and Drilling into Duralumin and Stainless Steel with Ultrasonic Vibration
5. (5) Ohnishi, O., Onikura, H., Effects of Ultrasonic Vibration on Microdrilling into Inclined surface, Journal of the Japan Society for Precision Engineering (in Japanese), Vol.69, No.9 (2003), pp. 1337-1341