Slope stability and erosion control: ecotechnological solutions / J. Norris [et al.], 2008 r=on-line. - Текст : электронный.
Stokes A. The shape of tree root systems affects root wood strength / A.Stokes, 1995. - 53 p. - Текст : непосредственный.
Eco-and ground bio-engineering: the use of vegetation to improve slope stability : proceedings of the first international conference on eco-engineering, 13 -17 September 2004 / ed. A. Stokes [et al.], 2007 r=on-line. - Текст : электронный.