1. Flint E, Flannery P, Evert M and Anderson E, “Cryocooler disturbance reduction with single and multiple axis active/passive vibration control systems,” published electronically at http://www.csaengineering.com/techpapers/techpapers.html, CSA Engineering, Inc.
2. Collins SA, Paduano JD, “Multi-axis vibration cancellation for Stirling cryocoolers,” Proceedings of the SPIE Cryogenic Optical Systems and Instruments Conference VI, Orlando, FL, Vol. 2227 (1994), pp. 145–155.
3. Johnson DL, Collins SA, Ross RG, Jr., “EMI Performance of the AIRS Cooler and Electronics,” Cryocoolers 10, Plenum Publishing Corp., New York (1999), pp. 771–780.
4. Yeoung-Wei A Wu, “Stirling-cycle cryogenic cooler using feed-forward vibration control,” UK Patent 2279770(1995).
5. Redlich, R, “Method and apparatus for measuring piston position in a free piston compressor,” US Patent 5,342,176 (1994).