Tutkitut lähteet:
Dutton, G. F. (1997). Some branch against the sky: The practice and principles of marginal gardening. David & Charles.
Taylor, B. B. (1986). Geoffrey Bawa: Architect in Sri Lanka. Butterworth Architecture.
Tunnard, C. (1948). Gardens in the modern landscape. (2., rev. ed.). Architectural Press.
Wiström, B. (2015). Forest edge development: Management and design of forest edges in infrastructure and urban environments (Acta Universitatis Agriculturae Sueciae, 2015:129) [Doctoral dissertation, Swedish University of Agricultural Sciences]. Swedish University of Agricultural Sciences.