1. Large scale concentration and conversion of solar energy, E⊕S;Hildebrandt;Trans. American Geophysical Union,1972
2. A solar thermal power system based upon optical transmission;Vant-Hull,1973
3. A tower top focus solar energy collector;Hildebrandt,1974
4. High power solar installations;Baum;Solar Energy,1957
5. The promise of large-scale solar power;Linitskii;Geliotekhnika,1967