1. Barlow, P.W. (1982) Cellular aspects of gravitropism, particularly in roots. In: Plant growth regulators 1982, pp. 507?518, Wareing, P.F., ed. Academic Press, London
2. Barlow, P.W. (1983) Root gravitropism and its cellular and physiological control. In: Wurzelökologic und ihre Nutzanwendung, pp. 279?294, Böhm, W., Kutschera, L., Lichtenegger, E., eds. Verlag Bundesanstalt Gumpenstein, Irdning, Austria
3. Barlow, P.W., Rathfelder, E.L., Lake, T.G., Fielding, W.J. (1984) Distribution of extension growth along gravireacting roots of Zea mays. The Physiologist 27, No. 6 S117-S119 (Suppl.)
4. Beffa, R., Pilet, P.-E. (1982a) Elongation and gravireaction of intact and segmented roots: light effects. Physiol. Plant. 54, 1?6
5. Beffa, R., Pilet, P.-E. (1982b) Growth and gravireaction of illuminated maize roots: kinetic analyses. Z. Pflanzenphysiol. 107, 443?456