Turner quoted by himself in TURNER T., 2006, Greenway planningin Britain: recent work and future plans, vol. 76, no. 1-4, pp.240-251 (Abstract)
Jack Ahern (Department of Landscape Architecture and Regional Planning, University of Massachusetts), Greenways as a planning strategy ; Landscape and Urban Planning Volume 33, Issues 1-3, October 1995, Pages 131-155 Greenways doi:10.1016/0169-2046(95)02039-V (Abstract)