1. Yun, S., Han, S., Kim, M., (2009), The world-wide market and technique trends of process & hydraulic-pneumatic valve, Journal of Drive and Control, 6(3), 2-9.
2. Korea Association of Standards & Testing Organizations, (2017), Altermeters, (Report No. KASTO 17-20401-427).
3. Korea Association of Standards & Testing Organizations, (2019), Absolute pressure gauges, (Report No. KASTO 19-20406-391).
4. Kim, B.-S., Lee, J.-J., Nam, K.-W., Jeong, G.-S., Ahn, C.-B., Sun, K., (2007), Pressure regulation system for optimal operation of the pneumatic vad with bellows-type closed pneumatic circuit, Journal of Biomedical Engineering Research, 28(4), 569-576.
5. Jang, J., (2001), A study on the pressure control of a pneumatic pressure vessel considering dynamic characteristics of pneumatic transmission line, Journal of Power System Engineering, 5(4), 90-96.