1. Thermal analysis of a solar collector containing a boiling fluid;Al-Tamimi,1983
2. Self controlling, self pumping heat crrculation system study;Wachtell;Franklin Research Center report C4772-2,1978
3. “T-System” proposal of a new concept heat transport system;Tamburini,1978
4. Heat-transmission device for solar heating systems;Nasonov;Geliotekhnika,1980
5. Device for passive downward heat transport: design criteria and operational results;De Beni,1981