1. Die Wirkung von Temperatur und Tageslänge auf die Blüteninduktion von Chinakohl (Brassica pekinensis);Elers,1982
2. The effect of plastic tunnels on air and soil temperatures in relation to observations of cloud-cover;Guttormsen;J. Agric. Eng. Res.,1972
3. Effect of plant age and temperature on bolting in Chinese cabbage;Guttormsen;Scientia Hortic.,1985
4. Seed-stalk formation and flowering in cabbage. I. Day-length, temperature, and time relationships;Heide;Meld. Nor. Landbreukshoegsk.,1970