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==References== | ==References== | ||
− | * | + | *ASTM. 2005. ''Method E2399-5, Standard Test Method for Maximum Media Density for Dead Load Analysis of Green Roof Systems.'' ASTM International, West Conshohocken, PA. |
*Bengtsson, L., L. Grahn, and J. Olsson. 2005. ''Hydrological function of a thin extensive green roof in southern Sweden''. Nordic Hydrol. 36 (3), 259–268. | *Bengtsson, L., L. Grahn, and J. Olsson. 2005. ''Hydrological function of a thin extensive green roof in southern Sweden''. Nordic Hydrol. 36 (3), 259–268. | ||
*Berghage, R. [http://plantscience.psu.edu/research/centers/green-roof Penn State Center for Green Roof Research]. ''Green Roof Media Nutrient Testing, Nutrient Management, and Runoff Water Quality''. Presentation to NASA Workshop. | *Berghage, R. [http://plantscience.psu.edu/research/centers/green-roof Penn State Center for Green Roof Research]. ''Green Roof Media Nutrient Testing, Nutrient Management, and Runoff Water Quality''. Presentation to NASA Workshop. |