1. F.L.L., 2002. Guidelines for the planning, execution, and upkeep of green-roof sites. Boon Germany.
2. ASTM International, 2009. Standard Test Method for Moisture Retention Curves of Porous Building Materials Using Pressure Plates. Designation: C1699–09.
3. Peak flows from thin sedum-moss roof;Bengtsson;Nord. Hydrol.,2005
4. Green Roofs for Stormwater Runoff Control, EP A/600/R-09/026;Berghage,2009
5. Stormwater runoff from a large commercial roof in Chicago;Berghage,2010