Einsatz von Solaranlagen in Entwicklungslaendern als Beispiel fuer angepasste Technologie und Moeglichkeiten ihrer Foerderung. The use of solar energy equipment in developing countries as an example for a soft technology and the possibilities for its promotion. Tagungsbericht.1 Deutsches Sonnenforum. Proceedings.1st German solar energy forumPURPER G.1977, pp. 487-497Book

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THERMOCHEMICAL HEAT STORAGE: STATE OF THE ART REPORTOELERT G; BEHRET H; FRIEDEL W et al.1982; DOC.-SWED. COUNC. BUILD. RES.; ISSN 0347-0962; SWE; DA. 1982; NO 2; PP. 1-162; BIBL. 78 REF.Serial Issue

Thermochemical heat storage for solar space heatingHODGETT, D. L; BEHRET, H; OELERT, G et al.L'Énergie solaire pour le froid et le conditionnement d'air. Institut international du froid. Commissions E1-E2. Réunions. 1982, pp 77-82Conference Paper