1. Action spectrum for the effect of day-extensions on flowering and apex elongation in green, light-grown wheat (Triticum aestivum AL.);Carr-Smith;Planta,1989
2. Über die Blütenbildung von Hyoscyamus niger Aund Arabidopsis thaliana Ain 72-Stunden-Zyklen;Clauss;Z. Bot.,1956
3. Cockshull, K. E., and Vince-Prue, D. (1980). Effects of the timing and light quality of daylength extensions on flower initiation. Glasshouse Crops Research Institute Annual Report 1979, pp. 64–67.
4. Effect of far-red energy on the photoperiodic control of flowering in Wintex barley (Hordeum vulgare AL.);Deitzer,1983
5. Photoperiodic induction in long-day plants;Deitzer,1985