1. Grasselly, C. and Crossa-Raynaud, P. (1980).L’Amandier.Maisonneuve et Larose, Paris.
2. McMichael, B. L. and Taylor, H. M. (1987). Applications and limitations of rhizotrons and minirhizotrons. In:Minirhizotron observation tubes: Methods and applications for measuring rhizosphere dynamics(Taylor, H. M., Ed.). American Society of Agronomy Special Publication Number 50, Madison, WI, USA, 1–13.
3. Ross, N. W. and Catlin, P. B. (1978). Rootstocks and root physiology. In:Almond orchard management(Micke, W. and Kester, D., Eds). Division of Agricultural Sciences, University of California, USA, 25–9.
4. Van Zyl, J. L. (1988).Response of grapevine roots to soil water regimes and irrigation systems.Technical Communication N° 215. Department of Agriculture and Water Supply, Viticultural and Oenological Research Insistute, Stellenbosch, South Africa, 30–43.
5. Villeneuve, F. and Bousquet, C. (1987). Pommier: Etude de quelques systèmes racinaires.Infos- Ctifl n” 37. CTIFUCEHM,Marsillargues, France, 7–14.