1. Boethwick, H. A., Hendricks, S. B., Toole, E. H., Toole, V. K.: Action of light on lettuce-seed germination. - Bot. Gaz.115: 205–225, 1954.
2. Felippe, G. M., Gherardi, E., Penteado, L. B. K., Annes, V. C. S., Sene, C. M.: Detecção de giberelinas durante a germinação deRumex obtusifolius L. - Arq. Inst. biol. (S. Paulo)37: 177–187, 1970.
3. Kendrick, R. E.: Photocontrol of seed germination. - Sci. Prog.63: 347–367, 1976.
4. Kendrick, R. E., Frankland, B.: Photocontrol of germination inAmaranthus caudatus.- Planta85: 326–339, 1969.
5. Noronha, A., Vicente, M., Felippe, G. M.: Effect of storage and growth conditions on photoblasticity of seeds ofCucumis anguria. -Hoehnea6: 7–10, 1976.