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Referanslar
1 Zhang, Chenglong; Cong, Weilong; Feng, Pingfa; Pei, Zhijian J. (2014). "Rotary ultrasonic machining of optical K9 glass using compressed air as coolant: a feasibility study". Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture. 228 (4):504. doi:10.1177/0954405413506195. hdl:2097/17898. S2CID 53380862.
2 Hong Hua Tan (13 August 2010). Applied Mechanics And Mechanical Engineering. Trans Tech Publications Ltd. p. 49. ISBN 978-3-03813-388-9.