1. High temperature heat storage in ground;Swedish Council for Building Research;Report No. R104:1983,1983
2. Low temperature heat storage in ground;Swedish Council for Building Research;Report No. R105:1983,1983
3. Sunstore project 1977–1980;Platell;Swedish Council for Building Reasearch, Report No. R100:1981,1981
4. Seasonal thermal storage;Margen;Swedish Council for Building Research, Document No. D4:1981,1981