1. Field N2O, CO2 and CH4 fluxes in relation to tillage, compaction and soil quality;Ball;Soil Till. Res.,1999
2. Dynamics of Fluids in Porous Media;Bear,1988
3. Berghage, R., Jarrett, A., Beattie, D., Kelley, K., Husain, S., Rezaei, F., Long, B., Negassi, A., Cameron, R., Hunt, W., 2007. Quantifying evaporation and transpirational water losses from green roofs and green roof media capacity for neutralizing acid rain. NDWRCP Research Project Report. The Pennsylvania State University, State College, PA.
4. Green roof performance towards management of runoff water quantity and quality: a review;Berndtsson;Ecol. Eng.,2010
5. BS 1377-7, 1990. Methods of test for soils for civil engineering purposes. Classification tests. Shear strength tests (total stress), British Standards Institution (BSI).