Plant growth characteristics under all direction illumination. I. Effects of light intensity, CO2 concentration and air temperature on growth rate of lettuce.
4) DOWNS, R. J., S. B. HENDRICKS, and H. A. BORTH WICK. 1957. Photoreversible control of elongation of Pinto beans and other plants under normal conditions of growth. Bot. Gaz. 118: 119-208.
5) GAASTRA, P. 1959. Photosynthesis of crop plants as influenced by light, carbon dioxide, temperature and stomatal diffusion resistance. Meded. Land-bouwhogesch. Wageningen 59: 1-68.