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- [4] Mechanics of fiber reinforcement in sands. Gray,D H,H Ohashi. Journal of Geotechnical Engineering ( ASCE) . 1983
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- [6] Morphology, strength and biomass of Manuka roots and their influence on slope stability. Watson,A J,C L O’ loughlin. New Zealand Journal of Forestry Science . 1985
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- [8] In -situ shear test of soil -root systems. Wu,T H,P E Beal,C Lan. Journal Geotechnical Engineering ( ASCE) . 1988
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- [10] El Ni?o as a Window of Opportunity for the Restoration of Degraded Arid Ecosystems[J] . Milena Holmgren,Marten Scheffer.  Ecosystems . 2001 (2)