1. 1) L.D. Landau and E.M. Lifshitz: “Statistical Physics,” 2nd ed. Elsevier (1987)
2. 2) K. Oshima, T. Matsushita and M. Murakami: “Heat Pipe Engineering,” Asakura, Tokyo (1979)
3. 3) R.A. Urbach and P.V. Mason: “IRAS cryogenic system flight performance report,” Adv. Cryo. Eng. 29 (1984) 651
4. 4) K. Narasaki: “Development of 1K-class mechanical cooler for SPICA,” Cryogenics 44 (2004) 375-381
5. 5) H. Okuda, et al.: “Infrared Technology in Astrophysics,” Journal of The Japan Society of Infrared Science and Technology 15 (2006) 7-16