1. Strumpf, H.J. and Coombs, M.G.,ASME J. Solar Eng., 1990, vol. 112, p. 12.
2. Gong, Z.X. and Mujumdar, A.S.,ASME J. Solar Eng., 1995, vol. 117, p. 215.
3. Reznitskii, L.A.,Zh. Neorg. Khim., 1998, vol. 43, no. 8, p. 1288.
4. Chekhovskoi, V.Ya. and Kochetkov, A.K., RF Utility Model Certificate no. 8121,Byull. Izobret., 1998, no. 10.
5. Strelkov, P.G., Kosourov, G.I., and Samoilov, B.N.,Izv. Akad. Nauk SSSR Ser. Fiz., 1963, vol. 17, no. 3, p. 383.