1. Barrett, M. and Ashton, F. M.: 1983, ?Napropamide Fluxes in Corn (Zea mays) Root Tissue?, Weed Sci. 31, 43?48.
2. Bidwell, R. G. S.: 1974, Plant Physiology, Macmillan Publ. Co., New York.
3. Briggs, G. E., Hope, A. B., and Robertson, R. N.: 1961, ?The Concept of Free Space?, in Electrolytes and Plant Cells, Wiley and Sons, New York.
4. Crisp, C. E.: 1972, ?Insecticides?, in Proc. 2nd Intern. IUPAC Cong. on Pest. Chem., Vol. 1, Tel Aviv, Israel, p. 211.
5. Devine, M. D., Bestman, H. D., and Vanden Born, W. H.: 1987, ?Uptake and Accumulation of the Herbicides Chlorsulfuron and Clopyralid in Excised Pea Root Tissue?, Plant Physiol. 85, 82?86.