Jilar, T. (1985). Large-scale solar heating technology: Ingelstad, a solar group heating plant without heat pumps. Swedish Council for Building Research.
Lua i Stíl Chicago (17ú heag.)Jilar, Torbjörn. Large-scale Solar Heating Technology: Ingelstad, a Solar Group Heating Plant Without Heat Pumps. Stockholm: Swedish Council for Building Research, 1985.
Lua MLA (8ú heag.)Jilar, Torbjörn. Large-scale Solar Heating Technology: Ingelstad, a Solar Group Heating Plant Without Heat Pumps. Swedish Council for Building Research, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.