1. Amsen, M. G. and Nielsen, O. F. (1988). Effect of high humidity on plant growth in energy-saving greenhouses.European Communities—Commission, Report EUR 11261 EN—The effects of high humidity on plant growth in energy-saving greenhouses, 37–44.
2. Anon. (1982). Tomatoes—double skinned, rigid plastic glazing comparison.Efford Experimental Horticulture Station, Lymington, Hants. Experiment report GP40/07837.
3. Anon (1983). Tomato—double skinned rigid plastic glazing comparison,—year 3.Efford Experimental Horticulture Station, Lymington, Hants. Experiment report GP40/09178.
4. Bjerre, H. (1980). Energibespare foranstaltninger ved planteproduktion i vaeksthuse, 1. Plan-teproduktion i vaeksthuse bygget a dobbelte acrylplader.Statens Planteavlsmode, 1981,3–10.
5. Buisman, J. (1983) Energiebesparend onderzoek bij Begonia.Bloemisterij onderzoek in Nederland over 1982,75–8.