1. Alvarenga, R.C., Costa, L.M., Moura Filho, W., Ragazzi, A.J., 1996. Crescimento de raı́zes de leguminosas em camadas de solo compactadas artificialmente. Rev. Braz. Ciência do Solo 20, 319–326 (in Portuguese with English abstract).
2. The effect of soil compaction on wheat during early tillering. III. Fate of carbon transported to the roots;Atwell;New Phytol.,1990
3. Uptake of solutes by multiple root systems from soil. III. A model for calculating the solute system developing in a finite volume of soil;Baldwin;Plant Soil,1973
4. Root elongation of seedling peas through layered soil of different penetration resistances;Bengough;Plant Soil,1993
5. Bennie, A.T.P., 1996. Growth and mechanical impedance. In: Waisel, Y., Eshel, A., Kafkafi, U. (Eds.), Plant Roots: The Hidden Half, 2nd Edition. Marcel Dekker, New York, pp. 453–470.