1. On morphogenesis of lettuce in relation to light and temperature;Bensink;Meded. Landbouwhogesch., Wageningen,1971
2. Lighting for Plant Growth;Bickford,1973
3. Prüfung eines Sinningien-Sortiments. Teil 1: Der Einfluss von Temperatur und Licht;Brandis;Gärtnerbörse Gartenwelt,1979
4. Spectral radiant power of lamps used in horticulture;Campbell;Am. Soc. Agric. Eng. Trans.,1975
5. Relative efficiency of high- and low-pressure sodium and incandescent filament lamps used to supplement natural winter light in greenhouses;Cathey;J. Am. Soc. Hortic. Sci.,1979