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2. Nast, T., Champagne, P, and Kotsubo, V, “Development of a Low-cost Unlimited-life Pulse Tube Cryocooler for Commercial Applications,” to be published in Adv. Cryo. Engin.
3. Nast, T. C., Champagne, P.J., Isaac, D., Pryor, G. M., von Savoye, R. L. and Naes, L. G., “Design, Performance and Testing of the Lockheed-Developed Mechanical Cryocooler,” Proc. 8th International Cryocooler Conference, Vail, CO (1994).