1. Adventitious organogenesis;De Klerk,2000
2. The propagation of hardy, woody plants from root cuttings: a review;Del Tredici;Int. Plant Prop. Soc. Comb. Proc.,1995
3. Cutting trough the confusion;Del Tredici;Am. Nurseryman,1996
4. The Reference Manual of Woody Plant Propagation: From Seed To Tissue Culture;Dirr,1987
5. Dreesen, D.R., Harrigton, J.T., 1999. Vegetative propagation of Aspen, Narrowleaf Cottonwood, and Riparian Trees and Shrubs, in: Landis, T.D., Barnett, J.P., (Tech. coords.), National Proceedings: Rorest and Conservation Nursery Associations-1998. Asheville, NC, pp. 129–137, (Gen. Tech. Rep. SRS-25).